充当

充当 [chōng dāng]

1. ■ serve as; act as; play the part of; pose as:

充当辩护士 play the part of an apologist;

充当翻译 act as interpreter;

充当炮灰 serve as cannon fodder;

充当一般等价物 act as a universal equivalent;

她不得不去那户人家充当佣人。 She had to go into service of that family.