Oral hygiene
[医] 口腔卫生
🧩 词语组成解析
oral
['ɔ:rəl]
adj. 口头的，口述的;口服的;属于或关于嘴的;构成或使用言语的;
n. （尤指外语考试中的）口试;
hygiene
['haɪdʒin]
n. 卫生，卫生学;保健法;
🗣️ 情景例句
We finished addressing over three hundred envelopes.
我们写了三百多个信封地址了。
To march in shingle file
排成一列前进
From time to time, I notice that he puts a piece of meat down his trousers just before he leaves the factory.
我经常看到，他在快要离厂前把一块肉藏在裤子里。