Your father is ill, you should call in a doctor at once. 你父亲病了,你应该马上请个大夫来? The police have been called in to help make it clear. 已请来了警察帮忙把这件事弄清楚? 5. call for要求,需要;提倡,号召; 叫(某人);接(某人,某物);喊着要……?例如: ...