They begin to mute their voices, not be as assertive.

他们开始放低嗓门，不再那么肯定了。

《柯林斯英汉双解大词典》

When it is practised to them, they begin to save money.

当他们实践了这一点，他们就开始省钱。

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They begin to dislike tourists and treat them impolitely.

他们开始不喜欢游客，对他们不礼貌。

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If the immune system weakens at any point, they begin to spread and then attack.

VOA: special.2009.03.25

the answer is, "When they were built, they were built in such a way as to have certain instructions that they begin to follow out."

答案是,在他们被创造出来时,就被构造成一种拥有特定指令,使它们能够依之开始工作的样子

耶鲁公开课 - 死亡课程节选

Perhaps they begin to view their body from up-- floating up above it.

或许他们开始飘浮在自己身体之上,从上往下看

耶鲁公开课 - 死亡课程节选

If they begin to demand greater rights, they could prove the real challenge for Dubai's future.

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Through their movie, they begin to facilitate honest conversation between girls and women of all ages.

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Beyond some point (trouble is, no one knows what) they begin to hit harder.

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