save one's breath

[often in imperative]not bother to say something because it is pointless

别废话

save the day (或situation)

find or provide a solution to a difficulty or disaster

救场，解决问题，排除灾难

save (someone's) face

save someone's life

prevent someone dying by taking specific action

抢救某人性命

save someone's skin (或 neck 或 bacon)

rescue someone from danger or difficulty

救某人脱离危险（或困难）

save the tide

(Nautical, archaic)get in and out of port while the tide lasts

(航海 古)涨潮时进出港

save someone the trouble (或 bother)

avoid involving someone in useless or pointless effort

省却某人麻烦（或费心）

write it down and &B{save yourself the trouble of} remembering.

把它写下来，免得你费心记它。

save (one's) breath

To refrain from a futile appeal or effort

不必白费劲：省去无用的请求或努力

Save your breath; you can't dissuade them.

别白费劲儿了；你劝阻不了他们的