Cemental
a. 白垩质的
🗣️ 情景例句
I made an appointment with the doctor at three.
我和医生约好3点钟看病。
After forty years teaching English he thinks it's time to call it a day.
他教英语四十年，认为该退休了。
It is better to ask for help at the beginning rather than to wait until a busy period when everyone is rushed off their feet.
最好在开始工作时就请人帮忙，而不是等到大学都忙得不可开交的时候。