EXIST[英文單詞]

EXIST[英文單詞]
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To live, especially in a difficult situation or with very little money (尤指在困境或貧困中)生活,生存 ,繼續存在~ (on sth) 。

詳細釋義

21世紀大英漢詞典

exist [iɡ'zist]

vi.

1. 存在;實有,實際上有: The world exists, whether you like it or not.

不管你喜歡與否,這個世界照樣存在。

2. 持續存在,繼續存在,繼續生存: Belief in magic still exists.

對魔法的迷信仍存在著。

3. (尤指在特殊的條件下或在特定的場所)發現,發生,出現;現存;具有;找得到: the qualities that exist in a person

人所具有的品質

Hunger exists in many parts of the world.

世界許多地方都發生饑荒。

4. 生存;生活,活著: We cannot exist without air, food and water.

我們沒有空氣、食物和水就不能生存。

5. (人)苦度日子,(尤指在逆境中)生活;得到基本的生活必需品(如食物和住所): She's not living, she's merely existing.

她不是在過活,只不過是在挨日子。

He exists on bread and water.

他靠麵包和水度日。

6. 【哲學】(存在主義哲學)存在

網路釋義

1.存在

2.檢查變數或函式是否已定義

3.現存

英英釋義

exist [iɡ'zist]

v.

1. have an existence, be extant

2. support oneself

he could barely exist on such a low wage

英語字典

exist 1

·Have objective reality or being

·Be found, esp. in a particular place or situation

·Live, esp. under adverse conditions

exist 2

·verb

·to be real; to be present in a place or situation 存在;實際上有。

Does life exist on other planets? 其他行星上有生命嗎?

The problem only exists in your head, Jane. 這個問題不過是你的想像,簡。

Few of these monkeys still exist in the wild. 這些野生的猴子已為數不多了。

A temple existed here hundreds of years ago. 幾百年前這兒有座

相關短語

詞組短語

exist invt. 存在於

exist as以…形式(或形態)存在,作為…而存在,

exist on靠…生存;靠…生活

網路短語

alien exist發現外星人

nature exist自然存在

exist as在

really exist確實存在

exist in存在於

NOT exist不存在

I EXIST我存在

if exist先判斷

to exist存在

pre-exist 早先存在;在先出現

例句用法

1. To live, you have to exist.

要生活,你首先必須存在。

2.They are things that already exist.

它們是已經存在的事實。

3.Problems still exist. I have no expectation.

問題依然存在,我沒有指望。

4.The trouble is that as yet such sensors do not exist.

問題是到目前為止這些感測器並不存在。

5.Experiments are easy because virtual worlds exist inparallel.

實驗是容易的,因為虛擬世界並行存在。

6.But theological differences certainly exist, and have to be managed.

但理念上的差異的確存在,並需要得到管控。

7.Even lone atoms of antimatter, or antiatoms, are not known to existin nature.

自然界裡連反物質的單個原子(也就是反原子)都不存在。

8. So perhaps the money did exist, but has since been spirited out of the company.

所以說這筆錢是有可能存在的,但這恰恰與公司的“真實”相違背。

9. No reliable figures existfor total costs, but a tally of billions of dollars is likely.

總的花費沒有可靠的數據存在,但幾十億美元的記賬還是有可能的。

10.The Chinese government has set aside11nature preserves where pandas are known to exist.

中國政府已經設立了11處已知有熊貓出沒的自然保護區。

11.Finally, if institutions are too complex to supervise, they are also too complex to exist.

最後,如果機構太過複雜,以至於無法監管,那么它們也沒有資格存在。

12.The committee's conclusions rely on technology and infrastructure that does not yet exist.

委員會的結論依賴於現在還不存在的技術和結構的基礎上。

13.Further work will be required to see if indeed two non-emitting triplet states exist in this region.

進一步的工作將是需要了解兩種不發射的三重性態是否確實存在在這一範圍。

14.Life exista lot of unfairness. you must learn to envisage, believe in your eyes and people around you.

上了大學才知道,生活是有很多不公平的,你一定要正視,相信實力和民眾的眼睛。

15.True sexual freedom, like all freedom, can existonly when the dignity of the human person is recognized.

真正的性自由,就像所有的自由一樣,只能存在於當人的高貴被承認的時候。

16. In study after study over the past decade, they've show nabilities previously thought to exist only in humans.

過去十年間,一項又一項研究表明,動物表現出過去認為只有人類才具有的能力。

17.On some shelf in some hexagon there must exist a book which is the formula and perfect compendium of all the rest.

在某處六邊形迴廊的某個書架上,肯定有一本書堪為其餘所有書籍的範本和完美總目。

18. It is alarming when the very outfits that exist to supply the economy with credit start to hoard it from each other.

這可是一個危險的信號,這些公司的存在就是為經濟發展提供貸款,而現在他們卻捂緊口袋。

19.Systems exist to check when people are awake, whether they have taken their medication, and what their vital signs are.

系統可以用來檢驗當人醒來時,他們是否已經吃藥以及他們的生命特徵是什麼。

20. In bacteria, strong correlations existbetween the ability to carry out repair replication and resistance to UV-irradiation.

在細菌中進行修復性複製的能力和對紫外線的耐抗性之間存在著顯著的相關性。

21.Partnerships can end at any time. But partnerships and individual proprietorships exist only as long as the owners are alive.

合夥關係可以在任何時候中斷,但合資公司和獨資企業只要其所有人活著就是一直存在。

22.Wolpert proves that in any such system of universes, quantities existthat cannot be ascertained by any inference device inside the system.

沃伯特證明,在宇宙的任何這類系統中,系統內的推論裝置都不能用來確定系統內的量。

23. To challenge these ideas is to invite blank stares of incomprehension – you might as well be telling a physicist that gravitydoes not exist.

要想挑戰這些想法,就會招致不理解的白眼——就像你是在告訴一位物理學家,地心引力並不存在似的。

24. In another conversation with MrGoldberg, MrCastro surprised his interviewer by embarking on a passionate defence of Israel's right to exist.

在另一篇和戈德堡先生的談話中,卡斯楚先生令人吃驚的開始熱情的為以色列的生存權辯護。

25.Safeguard and realization of Equal Rights of Peasants in Chinatoday is restricted to some extent by old system , and some exist blind area of law.

當代中國農民平等權利的保障和實現不同程度地受到了舊體制的制約,有的甚至還存在法律的盲區。

26.For instance, sometimesit only makes sense to use data encryption when no other alternatives exist; sometimes you don't need to use data encryption at all.

例如,有時只有在不存在其它可供選擇的辦法時使用數據加密才有意義;有時你完全不需要使用數據加密。

27. At the moment, standing forest is of little commercialvalue, and much of it continues to existonly because of laws intended to prevent total clearance of the land.

目前,現存的森林沒有多少商業價值,而其中大多數繼續存在的原因僅僅是由於法律意圖阻止對土地的全部開墾行為。

28. In fact, perfect clocks do not exist, so GPS receivers must also solve for a fourth unknown: the offset between the receiver's internal inexpensive clock and GPS network time.

但事實上,完美的時鐘並不存在,所以GPS接收器還必須解出第四個未知數,也就是接收器內部的廉價時鐘與GPS網路之間的時間差。

29.What makes this example disturbing is that it should be a simplecase: not only does the institution exist, but it has clear functionson which reasonable people broadly agree.

而這個例子讓人煩惱的原因是,它本應是件簡單的事情:這家機構不僅存在,而且有著明確的作用,頭腦清醒的人對此普遍認同。

30.And instead of allowing uncertainty to be an excuse for inaction, regulators should return to first principles: use the best science available but do not demand certainty where it does not exist.

科學不確定性不能做為怠惰的藉口,管理者應該回到基本原理:利用能取得的最佳科學,無需要求不可能存在的確定性。

詞義搜尋

exist

1、存在:數量特徵等客觀標準不統一就《公約》而言第27條中存在exist一詞含有穩定長期

2、生存:諾貝爾布魯內Norbert Brunner的作品《袋》Bag Objects每隻袋上有不同英文標識如EXIST

3、存在感:exist ...

資料庫

EXISTS

指定一個子查詢,檢測行的存在。

語法

EXISTS subquery

參數

subquery

是一個受限的 SELECT 語句 (不允許有 COMPUTE 子句和 INTO 關鍵字)。

結果類型

Boolean

結果值

如果子查詢包含行,則返回 TRUE。

示例

A. 在子查詢中使用 NULL 仍然返回結果集

這個例子在子查詢中指定 NULL,並返回結果集,通過使用 EXISTS 仍取值為 TRUE。

USE Northwind

GO

SELECT CategoryName

FROM Categories

WHERE EXISTS (SELECT NULL)

ORDER BY CategoryName ASC

GO

B. 比較使用 EXISTS 和 IN 的查詢

這個例子比較了兩個語義類似的查詢。第一個查詢使用 EXISTS 而第二個查詢使用 IN。注意兩個查詢返回相同的信息。

USE pubs

GO

SELECT DISTINCT pub_name

FROM publishers

WHERE EXISTS

(SELECT *

FROM titles

WHERE pub_id = publishers.pub_id

AND type = 'business')

GO

-- Or, using the IN clause:

USE pubs

GO

SELECT distinct pub_name

FROM publishers

WHERE pub_id IN

(SELECT pub_id

FROM titles

WHERE type = 'business')

GO

下面是任一查詢的結果集:

pub_name

----------------------------------------

Algodata Infosystems

New Moon Books

(2 row(s) affected)

C.比較使用 EXISTS 和 = ANY 的查詢

本示例顯示查找與出版商住在同一城市中的作者的兩種查詢方法:第一種方法使用 = ANY,第二種方法使用 EXISTS。注意這兩種方法返回相同的信息。

USE pubs

GO

SELECT au_lname, au_fname

FROM authors

WHERE exists

(SELECT *

FROM publishers

WHERE authors.city = publishers.city)

GO

-- Or, using = ANY

USE pubs

GO

SELECT au_lname, au_fname

FROM authors

WHERE city = ANY

(SELECT city

FROM publishers)

GO

下面是任一查詢的結果集:

au_lname au_fname

---------------------------------------- --------------------

Carson Cheryl

Bennet Abraham

(2 row(s) affected)

D.比較使用 EXISTS 和 IN 的查詢

本示例所示查詢查找由位於以字母 B 開頭的城市中的任一出版商出版的書名:

USE pubs

GO

SELECT title

FROM titles

WHERE EXISTS

(SELECT *

FROM publishers

WHERE pub_id = titles.pub_id

AND city LIKE 'B%')

GO

-- Or, using IN:

USE pubs

GO

SELECT title

FROM titles

WHERE pub_id IN

(SELECT pub_id

FROM publishers

WHERE city LIKE 'B%')

GO

下面是任一查詢的結果集:

title

------------------------------------------------------------------------

The Busy Executive's Database Guide

Cooking with Computers: Surreptitious Balance Sheets

You Can Combat Computer Stress!

Straight Talk About Computers

But Is It User Friendly?

Secrets of Silicon Valley

Net Etiquette

Is Anger the Enemy?

Life Without Fear

Prolonged Data Deprivation: Four Case Studies

Emotional Security: A New Algorithm

(11 row(s) affected)

E. 使用 NOT EXISTS

NOT EXISTS 的作用與 EXISTS 正相反。如果子查詢沒有返回行,則滿足 NOT EXISTS 中的 WHERE 子句。本示例查找不出版商業書籍的出版商的名稱:

USE pubs

GO

SELECT pub_name

FROM publishers

WHERE NOT EXISTS

(SELECT *

FROM titles

WHERE pub_id = publishers.pub_id

AND type = 'business')

ORDER BY pub_name

GO

下面是結果集:

pub_name

----------------------------------------

Binnet & Hardley

Five Lakes Publishing

GGG&G

Lucerne Publishing

Ramona Publishers

Scootney Books

(6 row(s) affected)

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