To move back and forth periodically, as a pendulum.

摆动(如钟摆)。

Alternate.

更迭；交替。

To quiver, as the voice.

颤动(如声音)。

To be stirred; to thrill, as in emotional response.

动摇；颤抖(如感情激动而有的反应)。

To cause to quiver; set in motion to and fro.

使震动；使摇摆。