英语：I am always amazed when I hear people saying that sports creates goodwill between the nations 当我听到人们说体育运动可以创造国家之间的友谊时
问题描述：
英语：I am always amazed when I hear people saying that sports creates goodwill between the nations 当我听到人们说体育运动可以创造国家之间的友谊时我总是很惊愕 这里为什么要用saying
答
hear sb. doing sth
固定搭配