These cilia are specialized for this task and their beating creates a current that expediently and beautifully directs every nearby thing into the waiting mouth of the microorganism.

这些纤毛专门用于这项任务，它们的跳动会产生一股，便而漂亮地附近的所有西导到微生物的等待口中。

His grandfather had expediently sided with the Soviets and retreated with them as the Nazis advanced.

他的祖父机智地站在苏联一，当纳粹进攻时，随同苏军撤退。