If you only want to work four hours a day, then be ruthless about it.

如果你一天只想工作四个小时，那么就要对它无情。

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Be ruthless about getting as much information and coaching as you can for free.

要无情地争取免费获得尽可能多的信息和指导。

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In order to get the important things done, we have to be ruthless at removing distractions.

为完成重要的任务，我们必须坚决地消除干扰。

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If we trained our children to be ruthless killers, they might kill us or get killed.

FORBES: Morality: Nature or Culture?

As Neil Kinnock and John Major found to their cost, the paper's campaigns can be ruthless and relentless.

BBC: The PM, the Sun and the dead soldier

They were considered to be ruthless, they were considered to be responsible for many deaths, for much suffering here.

CNN: Whitbeck: 'A lot of people will be happy'