Lapis dentalis
[医] 牙垢, 牙石
🧩 词语组成解析
[医] 石
🗣️ 情景例句
See how things go for another month before you decide what to do.
你先等一个月，看看形势的发展再作决定。
He's a policeman.
他是警察。
He drives more carefully than you.
他开车比你小心。