Microdomatacea
小粒螺超科
🗣️ 情景例句
I agree with much of what you said.
我基本上同意你的意见。
Do you have a letter of introduction?
你有介绍信吗？
a trough (the lowest point), a height (the vertical distance from the trough to the crest),
波谷（最低点）、浪高（从波谷到浪峰的垂直距离）