Librate
vi. 摆动, 颤动, 保持平衡
🗣️ 情景例句
Well, do we have a date?
怎样 ，我们算是约定了吗？
It takes a bit of nerve to cross these chain bridges.
过这种铁锁桥需要有点胆量才行。
It was from the study of these that so much was learnt about the interior of the earth.
正是从这两种波的研究中，我们可以了解到地球内部的许多情况。