You could have spared yourself an unnecessary trip by phoning in advance.

你要是先打个电话就用不着跑这一趟了。

《牛津词典》

He might have spared himself the trouble.

他本来可以不必自找麻烦。

youdao

The advanced techniques of the information age have spared us all those troubles.

先进的信息时代能够省却我们所有的麻烦。

youdao

No one will be spared. Until now,nations have focused almost solely on ways to mitigate climate change by reducing greenhouse gases.

VOA: standard.2009.08.31

Peter was lamenting Edward King's death, and he claimed that he would gladly have spared an entire slew of corrupt Anglican priests.

彼得哀悼着爱德华金的逝世，并且声称他不会轻易地宽恕,所有堕落的圣公会牧师们。

耶鲁公开课 - 弥尔顿课程节选

Look at line 113. This is where Peter is addressing Edward King himself: How well could I have spared for thee, young swain, Enough of such as for their bellies' sake, Creep and intrude and climb into the fold?

看第113行，这是彼得自己提到爱德华金的地方：,年轻人，我该如何宽恕你，我对你的宽恕如此之多，你却硬要堕入信徒的深渊？

耶鲁公开课 - 弥尔顿课程节选

ImClone's former chief might have spared himself Wednesday's indictment if he had just fessed up.

FORBES: Congress To Martha: Tell It To The Feds

Now, with the baht down to about 45, Hana's forward contracts have spared it further pain.

ECONOMIST: Asian currencies

However, there is also a sigh of relief that the latest crisis seems to have spared most of Europe so far.

CNN: Foot and mouth: crisis at the door