sparing

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So you can turn the trolley car, if you want to, onto the side track, killing the one, but sparing the five.
所以，你可以将火车开向另一条岔道——如果你愿意的话——杀死那一个工人，但救了另外五个。
The best response to all these worries is to encourage more sparing use of resources, and that is what the government is trying to do.
对所有这些担心最好的反应是鼓励更加节约地使用资源，而这是政府正在尝试去做的。
There is also an overhead with providing information in this way, and you should try to be sparing with sharing information, particularly large structures.
还应该考虑以这种方式提供信息的开销，应该通过共享信息尽可能降低开销，尤其是对于大型结构。

It can also interact with other medications, especially certain types of cardiovascular medications such as ACE inhibitors,receptor blockers and potassium-sparing diuretics."
Your steering wheel works, so you can turn the trolley car, if you want to, onto the side track killing the one but sparing the five.
而你的方向盘还没坏，只要你想，就可以把电车转到侧轨上去,牺牲一人挽救五人性命。
耶鲁公开课 - 公正课程节选
"Our commanders are sparing no effort to find this young soldier.

That means fewer tractors and the carbon-sparing equivalent of taking 6 million cars off the road.
FORBES: Green Genes

Someone who is sparing with something uses it or gives it only in very small quantities.
sparingly