The guerrillas threatened to kill their hostages.

游击队员们威胁要杀死人质。

《柯林斯英汉双解大词典》

The hijackers threatened to kill one passenger every hour if their demands were not met.

劫机者要挟说，如果他们的要求得不到满足，他们每过一小时就杀死一名乘客。

《牛津词典》

He had a terrible temper, and once threatened to kill another child.

他脾气暴躁，曾经威胁要杀死另一个孩子。

youdao

The pirates threatened to kill their hostage if they were attacked.

VOA: special.2009.05.27

In one case,a U.S.interrogator reportedly threatened to kill the children of detained al Qaida mastermind Khalid Sheikh Mohammed if new terrorist attacks were launched on the United States.

VOA: standard.2009.08.24

How lucky and joyous to be forced to marry the man who threatened to kill you!

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The teen quoted the obscenity he says Drayton used as the rapper threatened to kill him.

NPR: Flavor Flav Felony Case Headed For Trial In Vegas

She told the court Lloyd had threatened to kill her if she left him.

BBC: Rebecca Lewis accepted she had a duty to protect her son