You need a
moderator to settle this argument.
你们需要一名仲裁者来解决这场争论。
Mary acts as the
moderator in our office meetings.
玛丽是我们办公室会议的主持人。
The
moderator is the person who decides who will speak next.
主持人就是决定接下来谁发言的那个人。
Pool-type low-temperature reactors run under normal pressure and at low temperatures, with water acting as a neutron moderator, coolant and radiation shield, Liu said.
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