how to use表示怎样使用sth，后面可以加某件事物/物品等。
例句：
1、In the measure that you learn how to use water to cultivate,then you're going to be able to spread beyond the Nile.了解到如何用水来灌溉农田后，你还要能够把尼罗河水抽取上来。
2、It is also easy to demonstrate to my students,and I have taught them how to use it in term projects.它还很容易向我的学生示范，并且我已经教授了学生如何在学期项目中利用它。
