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
I admire him for his success in business.
我佩服他事业有成。
I don't know. You may look in the TV Guide.
我不知道，你可以看看《电视报》。
As it was extremely heavy, he dumped it on the counter.
布袋很沉，他重重地把布袋扔在柜台上。