n.震动；颤动
Even at full speed the ship's engines cause very little vibration. 这条船即使全速前进，发动机的震动也很小。
The vibration during operation often caused the nuts to loosen. 机器运转时的震动常使螺母变得松动。
He told me that middle C is equivalent to 256 vibrations per second. 他告诉我说中央C音相当于每秒振动256次。
adj.振动的；颤动的
心情激动
