（拉）必要條件；要素

condition決定；使適應；使健康；以…為條件

demand（堅決的或困難的）要求；（顧客的）需求

essential本質；要素；要點；必需品

must絕對必要的事物；待發酵的葡萄汁；發霉，潮氣

necessary必需品

necessity需要；必然性；必需品

need需要，必須； 特別需要，迫切要求；欲望；（食物、錢或生活來源的）短缺，缺乏；必需品；貧困（或困難）的處境

needful必須做的事；錢

requirement要求；必要條件；必需品

requisite必需品

nonessential不重要的人

although big roof, incline plane, long overhang eaves and high rake angle are characteristics of chinese ancient palatial architecture, the lips and beasts are parts sine qua non in roof decoration.

大屋頂、斜坡面、深出檐、高翹角是中國古代宮殿建筑的特點，而脊吻、走獸又是屋頂裝飾不可缺少的部件。

he soon found that freedom from fear of arrest was not the sine qua non of his existence.

他很快就發現，消除對被捕的恐懼，并不是他生存的必要條件。

all this, he writes, 「began with water, the sine qua non of any civilization.」

他寫道，所有這些，「來源於水，水是任何文明產生的必不可少的條件。」

the perfect cake is the sine qua non of the modern wedding.

一個完美的蛋糕是現代的婚禮中不可缺少的東西。

research shows that nicotine is a sine qua non of tobacco addiction and that it produces the hallmark effects of addictive drugs.

研究表明，尼古丁不僅是煙草成癮的一個要素，而且它能產生同成癮性藥物一樣的效應。

the perfect cake is the sine qua non of the carefully planned modern wedding(j. m. hilary)

一個完美的蛋糕在一個精心籌劃的現代婚禮中是必不可少的（j.m。希拉里）

a well-functioning financial sector will be a sine qua non for any developing economy.

任何發展中國家都需要一個功能齊備的金融體系。

this would seem to confirm the fears of green internationalists, who have long portrayed binding emissions targets as the sine qua non of seriousness on climate change.

這看上去支持了綠色國際主義者的擔憂，他們一直以來都把強制性的減排目標當成解決氣候變化的必要措施。

the sine qua non of an information age siege is intelligence.

信息時代包圍行動的必要條件是情報。

you can still provide reporters with that sine qua non of the entrepreneur「s yarn, the eureka moment.

你還是可以向記者提供企業家成功故事中不可缺少的戲劇性素材。

you could say that the very sine qua non of unix and linux programming is writing code to deal with files.

您可以認為，unix和linux編程實際上是編寫處理各種文件的代碼。

thee control of inflation is a sine qua non for economic stability.

控制通貨膨脹是經濟穩定的前提。 。

the code」s sine qua non is honour, or nang, a word which, according to sir olaf caroe, an imperial scholar of the pushtuns, contains a mythical sense of chastity.

該規范的先決要素是榮譽（honour[font=宋體]），或說是「nang[font=宋體]」，根據普什圖人的皇家學者奧拉夫·卡羅爵士（sirolafcaroe[font=宋體]）的說法，該詞包含了某種貞節（chastity[font=宋體]）的神秘感。

the conservation law of charge is taken here as a sine qua non so that the equation can have the unique solution.

文章在此將電荷守恒定律作為必要條件引入，使得方程具有唯一確定的解。

direct competition is not the sine qua non of trademark infringement; rather the gist of the trademark action lies in the likelihood of confusion to the public.

直接競爭不是商標侵權的必要條件，商標侵權訴訟的主因更多地基於給公眾造成混淆的可能性。

therefore, to be hypocrisy is sine qua non in mundane life. nothing chuang tzu can remark on.

所以在世俗生活中做一名偽君子是必不可少的重要條件，對此，莊先生又有什么好評論的呢？

that is depressing for those who seek martians, even bacterial ones, for most biologists agree that liquid water is a sine qua non of life.

對於那些尋找來自火星的哪怕是細菌生物的人來說，那是令人沮喪的。因為大部分生物學家都會同意水是生命之源。 ！

absorbed attention — the capacity to delay other gratifications to focus on one thing at a time — is the sine qua non of achieving and sustaining excellence at anything.

全神貫注——暫時忽略其他需要，把注意力集中在一件事情上的能力——是一個人在任何事情上取得卓越成就并持續發展的必要條件。

and quite frankly, i think that such civility is the sine qua non of conducting the affairs of the court and the business of the country.

而且相當坦白地說，我認為這樣的文明禮儀，是指導我們司法行事和處理國家事務所必不可少的因素。