Pseudotrachea
唇瓣环沟
🗣️ 情景例句
I know, Grandpa.
我知道 ，爷爷。
What will you do then?
你那时将做什么？
After he had put it on the floor, he promptly went to sleep again.
他把床垫往地板上一放，很快又睡着了。