Gingival sulci
[医] 龈沟
🧩 词语组成解析
a. 齿龈的\\n[医] 龈的
[医] 沟
🗣️ 情景例句
I never bother servicing my own car, it's too much trouble.
我从来都不自己修车的，麻烦死了。
I'm afraid you will be late.
我怕你会迟到。
Would you be kind enough to sign our visitors book?
请在来宾簿上签名好吗？