You need not feel obliged to contribute.
你不必认为你非得捐款。
Previous applicants for the post need not reapply.
申请过这个职位的人不需重新申请。
From the day you arrive at my house, you need not spend a single penny.
从你到我家的那一天起，你就分文不需花了。
You need not be sorry for her.
你们不必为她难过。
我们当时实在不必那么匆忙。
The professors need not worry so much.
教授们不用太担心。
It need not be said who was the captain.
不用说谁是船长。
However, the professors need not worry so much.
然而，教授们不用太担心。
Yet we need not lose heart over this bad habit.
然而，我们不必对这种坏习惯丧失信心。
You need not flare up merely because I mentioned your work.
你不必因为我提到你的工作就大发雷霆。
For some mysterious reason, he knew he need not watch Dickon.
出于某种神秘的原因，他知道他不需要警惕狄肯。
He had one last triumph, which I think we need not grudge him.
他还有最后一次胜利，我想我们不必嫉妒他。
What Mary felt afterward was that she need not fear about Dickon.
玛丽后来觉得她不必再为狄肯担心。
She was relieved to hear that she need not look after Mary too much.
听到不必将玛丽管得太严，她松了一口气。
"Now," he said at the end of the story, "it need not be a secret any more."
“现在，”他在故事的结尾说，“这不再是秘密了。”
In this case, despite the name of the property, it need not and should not be unique.
在这种情况下，尽管该属性具有名称，但它不必也不应该是唯一的。
We have learned that a market crash need not lead to economic disaster.
我们已经认识到一次市场崩溃未必导致经济灾难。
Consensus need not be weak, nor need it result in middle-of-the-road policies.
多数人的意见不一定就软弱，也不一定会导致中立的政策。
The message is that they need not be disasters.
这传递的信息是：它们不一定是灾难。
This in itself, of course, need not be a bad thing.
当然，这本身未必是一件坏事。
To be able to support life, the new planet would need not only to have water, but it would also need to be solid.
为了能够维持生命，这个新的星球不仅要有液态水，而且它的土表还必须是固态的，就像地球这样。
As long as the green hills are there, one need not worry about firewood.
留得青山在，不愁没柴烧。
But they need not have rushed.
但是他们并不用这么着急。
但是雇员们不用担心。
Synthetic fibers need not apply.
人造纤维的就不要买啦。
这其实不需要警告。
然而他们没有必要这样做。
这并不一定是灾难。
But you need not venture forth alone.
但是你不需要独自冒险。
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