Semiannular
a. 半圆形的
🗣️ 情景例句
We had a good time.
我们玩得很愉快。
You'll hurt yourself, if you don't take care.
你不专心的话，就会伤到你自己。
Portable boiling elements that can boil small quantities of water are useful when the right voltage of electricity is available.
如果有相配的电压，可以煮少量水的便携式热水装置是有用的。