Odontia incrustans
[医] 牙垢
🧩 词语组成解析
[医] 牙痛, 牙病
🗣️ 情景例句
Are all the classes within walking distance?
所有的教室都在步行范围之内吗？
He often fails to keep his word.
他常常不遵守诺言。
Instead he bought himself fifty pence worth of trouble.
却拿这钱给自己买了50便士的麻烦。