关于be used for和be used as

be used for:
用于
例句与用法:
1.Aluminum foil can be used for wrapping food.
铝箔用于包装食物.
2.The extent to which a program can be used for similar but not identical applications,perhaps with slight modifications.
一个程序可能经过稍许修改就能用于各种类似但不完全相同的应用方面的程度.
3.Another might be used for control purposes; changing the mode of the controller.
另一个则用于控制目的,用来改变控制器的运行模式.
4.Tallow can be used for making soap.
动物脂可以用来做香皂.
5.Hemp can be used for cloth and ropes.
大麻可用来做衣服和绳子.
6.Cretonne can be used for furniture covers and curtains.
印花棉布能被用来做家俱套和窗帘.
7.Like many discoveries,atomic power can be used for good or evil.
正如人类发现的许多事物一样,原子能既可用来为善,也可用以作恶.
8.The grease from pork can be used for frying.
猪肉炼出的油可用来煎炸食物.
be used as - 是用来做什么/用处 的意识.
The National flag is used as a symbol of the Country.
国旗代表着国家.