慢速英语:Training Medical Teams to Communicate Better During Operations

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例句：The new law empowered the police to search private house.
      新法律给予警察搜查私人住宅的权利。

2.flatten v.停止增长(或上升)

例句：Sales have flattened out in the last few years.
      过去几年销售额已逐渐停止增长。

使变平

例句：She flattened out the crumpled letter on the desk.
      她在写字台上把皱巴巴的信展平。

3.hierarchy n.等级制度

例句：There is a rigid hierarchy of power in that country.
      那个国家有一套严密的权力等级制度。

4.initially adv.开始,最初,起初

例句：Feathers initially developed from insect scales.
      羽毛最初由昆虫的翅瓣演化而来。

5.enhance vt.提高, 增加, 加强

例句：The growth of a city often enhances the value of land close to it.
      城市的发展常常会提高其附近的地价。

6.universal adj.普遍的；全体的；全世界的；共同的

例句：His speech met with universal applause.
      他的演讲博得全场的喝彩。