这个风扇是电动操作的，非常安静。

This fan operates ___electrically, so it's very quiet.

这个设备必须正确接地才能安全地用电运行。

This device must be properly grounded to operate ___electrically safely.

观众们兴奋地等待着，空气中充满了紧张感。

The crowd waited ___eagerly as the tension filled the air.