be used to do的意思是被用来做某事。
例句:
The threshing ground was used to hold a mass meeting. 打谷场曾用于举行群众大会。
He was used to the cold weather after he lived there for two years. 在那里住两年后,他已习惯了寒冷的天气。
A metal bar was used to force the door open. 用金属棒把门撬开。
The threshing ground was used to hold a mass meeting. 打谷场曾用于举行群众大会。