Boric acid has been used to kill other insects including cockroaches, termites and ants inside homes since the middle of last century.

VOA: special.2011.02.23

And one possible response, the last one we'll look at, is, what you should, at least sometimes, s kill yourself.

一个可能的回应是，就是我们将讨论的最后一个话题，你应该做的，至少是有时应该做的，是自杀。

耶鲁公开课 - 死亡课程节选

And the last question we'll turn to is, could it ever make sense to kill ourselves?

而最后一个问题就似乎，自杀是有意义的吗？

耶鲁公开课 - 死亡课程节选

Officers even followed up on Wearside, while Sutcliffe went on to kill the last three of his 13 victims.

BBC: NEWS | UK | England | Hunt ended for 'Ripper' hoaxer

Another victim told the jury that she attempted to kill herself last year because she was ashamed of what had happened to her.

BBC: Former serviceman Gordon Pinkerton guilty of abuse

One victim had told the trial, at the High Court in Aberdeen, that she attempted to kill herself last year because she was ashamed of what had happened to her.

BBC: Gordon Pinkerton