Protocneme
(用某种射线可以辨别出的)无脊椎动物十二个原始隔膜之一
🗣️ 情景例句
Not now, I'm not in the mood for an argument.
别这样，我可不想吵架。
I went there on business.
我出差到那儿。
It's a bit small, isn't it?
缸不小吗？