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
when she was running for the school board.
在妈妈竞选联合校董会席次时。
We can't decide what to do.
我们不能决定怎么做。
so that I was positive I should recognize it as familiar territory.
因此，我相信这段路对我来说会是很熟悉的。