The killing was the act of a madman.

这起凶杀案是一个疯子所为。

《牛津词典》

The motive for the killing is unknown.

杀人的动机不明。

《柯林斯英汉双解大词典》

The killing had not been premeditated.

这次杀人不是预谋的。

《牛津词典》

For example,a group called Shark Safe helped prevent the killing of sharks at a fishing competition in Florida earlier this month.

VOA: special.2009.06.16

It's entirely imaginable that Milton could have been executed for his writings on behalf of the killing of King Charles.

由于他所写的关于处死查理国王的文章,弥尔顿完全可能被处死的。

耶鲁公开课 - 弥尔顿课程节选

I have to believe that the bulk of the killing took place on the flight and so that's why that works out.

但我相信,惨重的伤亡会在逃跑时出现,这就是为什么会算出那么惨重的伤亡数字

耶鲁公开课 - 古希腊历史简介课程节选

The killing of black African civilians here in Kidinyir and across Darfur has been thorough, systematic and planned.

BBC: [an error occurred while processing this directive]

In all, 12 people have been arrested, including Adebolajo and Adebowale, in connection with the killing.

CNN: 2nd man appears in London court over soldier's killing

Both men were arrested within days and immediately blamed each other for the killing.

BBC: South East Wales