act as something phrasal verbphr v DOto do a particular job for a short time, for example while the usual person is absent 〔暂时〕代理〔某人的工作〕 My brother speaks French – he can act as interpreter. 我弟弟会说法语,他可以充当翻译。
act as • DeConcini acted as host at the meeting.
→ act as something at act2(PHRASAL VERB)