Congress is being asked to investigate why it took so long for government regulators to shut the plant down.

人们要求国会调查政府监管机构为何花了这么长时间才关闭该工厂。

An independent regulator will be appointed to ensure fair competition.

将会指定一个独立的管理机构来保证公平竞争。

An automatic voltage regulator ensured a constant output from the generator.

一个自动电压调节器保证了发电机电流输出的稳定。