The pendulum will librate back and forth.

钟摆会来回振动。

The tuning fork will librate when struck.

音叉被敲击时会振动。

The guitar string will librate when plucked.

吉他弦被拨动时会振动。

Engineers designed the bridge to librate slightly during strong winds.

工程师设计了桥梁，使其在强风中轻微振动。

The spacecraft's antenna began to librate as it adjusted its position.

航天器的天线在调整位置时开始振动。