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
It's nice seeing you.
非常高兴见到你。
The fool talks, and the wise man thinks.
蠢人嘴巴讲，聪明人用心想。
She doesn't approve gambling.
她反对赌博。