Calyculus
n. 副萼, 杯状小体\\n[医] 杯状器官, 副萼
🗣️ 情景例句
I'll be in the front office all day.
我整天都在总办公室。
At open doors dogs come in.
狗从开着的门中进来。
only of metal, which wears away by friction.
而是由金属组成，而金属可以随着磨擦而磨损殆尽。