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
Yeah. My new advanced exercise class.
对， 新的高级健身班。
Strike while the iron is hot.
见机行事。称热打铁。
They had to edge their way along this, sometimes wading across shallow streams, or swimming across deep pools.
他们不得不侧着身子往前走，有时过浅溪，有时游过深潭。