" Necessary? No, I should not say that it is necessary to kill."

“一定？不，我认为不一定要杀人。”

It can be frivolous, but it doesn't have to be.

快乐可能是无意义的，但也不一定如此。

'But you needn't be a missionary! ' I cried.

“可你不一定非做传教士啊！”我叫道。

Or just emergencies, not necessarily angry ones.

或者只是紧急情况，不一定是愤怒的。

Even if we tried getting everyone to press the pedal on 3-2-1-now would be challenging.

使我们试图让每个人都倒数着 “3,2,1” 踩下踏板， 依然十分困难， 也不一定能实现。

Provincial officials dispute this and say the battle is continuing.

但多名省政府官员驳斥了说法，并表示鹿死谁手还不一定。

Your solutions don't have to be world shattering breakthroughs.

你的解决方案不一定要成为震惊世界的突破性进展。

No prior musical experience is necessary.

不一定需要有音乐经验。

So you don't have to do amazing things with your money to make yourself happy.

所以你不一定非得花钱做一些特殊的事情才能获得快乐。

So wherever that torch goes it's not gonna necessarily be a happy occasion.

因此，无论火炬走到哪里，都不一定会是一个快乐的时刻。

But, Rob, things don't have to be chaotic.

不过，罗伯，事情不一定必须混乱无序。

Product claims don't necessarily have to stack up in such a necessarily rigorous way.

产品声明不一定必须以这种严格的方式来进行。

Simulated English tests may not always accurately reflect one's true proficiency and skills.

英语模拟考试不一定总能准确地反映一个人的真实水平和技能。

Not necessarily bad guys, but dangerous guys if you happen to believe in intellectual freedom.

倒不一定是坏人，但却相当危险，如果你碰巧信奉精神自由的话。

But even that may not be enough, thanks to Iran's mastery of smart concrete.

但使这样也不一定能成功，因为伊朗掌握着智能混凝土的制作技术。

But getting sick is not a certain outcome.

但受到这种感染的人不一定就会生病。

This might be a liability for most candidates, but not necessarily for Trump.

这可能是大多数候选人的负担，但不一定是特朗普的负担。

But if decline is not inevitable, nor is resurgence.

但是，如果衰落并非注定发生，重振威风也不一定。

No, absolutely. This merit is something quite special.

不，一定要。这个是一个非常特别的功勋。

Stay calm, it doesn't necessarily mean what you think it means . . .

保持冷静，不一定就是你所认为的那样？？