Gingival trough
[医] 龈沟
🧩 词语组成解析
a. 齿龈的\\n[医] 龈的
trough
['trɔ:f]
n. 水槽，食槽;低谷期;[航]深海漕;[气]低气压槽;
🗣️ 情景例句
That's my destination.
那是我要去的地方。
what's his native language?
他的母语是什么？
The woman was a visitor. She did not live in London. She lived in the country.
这老太太是位游客，不住在伦敦。