Shares may but need not be represented by certificates.

股票可以，但是并不必须要有证书来代表。

youdao

In most cases, we only need a few but not all.

在大部分情况下，我们只需要几个而不是全部。

youdao

Eligibility is determined not by one's need but by the date on one's birth certificate.

资格不是由个人的需要决定，而是由个人出生证明上的日期决定的。

youdao

But they do need to be careful not to wound themselves with chainsaws or other pruning tools.

VOA: special.2009.10.06

We need to know not only what are the primitives, but how do we make things meaningful in that language.

我们不仅需要知道什么是基本类型，还要知道我们在那种语言中,怎样使其变得有意义。

麻省理工公开课 - 计算机科学及编程导论课程节选

Originally, we thought it's information needs only; we just need to find a web page that contains the query word, but it's actually not.

起初，我们以为人们只是需要信息而已;,只需找到一个带有关键字的网页即可，但实际上并不是。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

Web service providers cannot turn a blind eye to specific infringement violations, but need not actively seek out infringers.

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Higher health spending obviously puts pressure on the overall level of public spending, but need not blow a hole in the public finances.

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The year 2013 will not be easy for investors, but it need not be traumatic or profitless.

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