Cyclostome
n. 圆口类脊柱动物\\na. 圆口动物的
🗣️ 情景例句
You've met my wife Marilyn ...
你曾经见过我太太Marilyn……
She began playing the violin when she was nine.
她从九岁就开始练习小提琴。
The question was, which one?
问题是，哪一种气体导致火灾呢？