考试时你必须保持沉默。

You must keep silent during the exam.

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开车时，你必须保持完全清醒。

When driving, you must stay wide awake.

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无论发生了什么，你必须保持镇静。

No matter what happens to you, you must stay composed.

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看电影的时候，你必须保持安静。

You keep quiet while watching the film.

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当你在图书馆时，你必须保持安静。

When you are in a library, you must be quiet.

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当你在图书馆时，你必须保持安静。

Please keep quiet while others are studying.

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不论什么事发生，你必须保持冷静。

Whatever may happen, you must keep calm.

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你必须保持清醒和控制力。

You have to be lucid and in control.

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但是你必须保持房间的温暖。

But you must keep the room warm.

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你必须保持积极的态度，并让人安心。

You need to be positive and reassuring.

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你必须保持冷静的来面对它。

And then, you have to keep calm and face it unhurriedly.

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你必须保持正确的精神状态。

You have to be in the right state of mind.

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“你必须保持镇静。”大夫扶着他说。

"You must compose yourself," said the doctor, supporting her.

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如果你想保持平衡，你必须保持前进。

To keep your balance, you must keep moving"."

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你必须保持你的身体水合。

You need to keep your body hydrated.

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不管你自己多么害怕，你必须保持冷静。

However frightened you may be yourself, you must remain calm.

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这段时间你必须保持镇定。

This was a time when you had to keep calm.

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好吧，你必须保持冷静。

All right, keep your cool.

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你必须保持你的头，噢。

You gotta keep your head up, oh.

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你必须保持镇静。

You must observe calm.

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在高压力的情况下你必须保持冷静的头脑。

These are high pressure situations and you have to keep a cool head.

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你必须保持完整地记录所有营业收入和支出。

You must maintain complete records of all business income and expenses .

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你必须保持头脑清醒。

You must keep your head clear.

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你必须保持总平均“B”，才能拿硕士学位。

You must maintain a "B" average to earn your master's.

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你必须保持身体健康。

You must keep healthy.

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这里有一个入门的基本企业记录你必须保持。

Here's a primer on the basic corporate records you need to maintain.

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它的好处，可兴奋了，但你必须保持现实的。

It 's good to be excited, but you have to remain realistic.

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它的好处，可兴奋了，但你必须保持现实的。

It 's good to be excited, but you have to remain realistic.

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