计算机现在是家庭医生非常有用的工具。

The computer is now an invaluable tool for the family doctor.

《牛津词典》

这两种报表都是非常有用的工具。

Both are very powerful tools.

youdao

在分析由应用程序生成的页面时，这是非常有用的工具。

This is a useful tool when analyzing the page generated by the application.

youdao

OK. So, what do I want you to take away from this? This idea of binary search is going to be a really powerful tool. And it has this property again, of chopping things into pieces.

从这里学到些什么？二分查找的思想,是一个非常有用的工具,我重复一遍，把问题拆成几部分来解决,那事实上，这里的增长率是多少？

麻省理工公开课 - 计算机科学及编程导论课程节选

it was reversible, so you can give people money and take it away, and you could actually scale the amount of money, so it makes a very handy experimental tool.

这个过程是可逆的，这样你可以给人钱，然后拿走，而且你还可以积攒钱，这就让钱成为了一种非常有用的试验工具。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选