加入的

In a closed "primary" loop, it serves as a coolant for thereactor core and as a moderator, to slow down the fast neutrons created duringfission.

在一个封闭的&主&环中，水是反应堆核心的冷冻剂和减慢裂变中高速中子的调节器。

Mr. Smith, this is Mr. Chen, the plant manager.

史密斯先生，这是工厂经理，陈先生。