act as

1do the work ofserve as当作;充当

A trained dog can act as a guide to a blind person.一条经过训练的狗可以给盲人当向导。

This kind of tea act as an aid to digestion.这种茶助消化。

2play the role of担任…的角色

One of his friends acted as the gobetween.他的一个朋友充当了中间人的角色。


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