Epidiabase
变辉绿岩
🗣️ 情景例句
This is the big moment.
这可是关键时刻。
Many happy returns of the day.
祝您长寿。
and a period (which is the time it takes a wave crest to travel one wave length).
和周期（浪峰走过一个波长所需的时间）。