Semicircumference
n. 半圆周
🗣️ 情景例句
How much is a room per night?
一个房间每晚多少钱？
My friend phoned me at 10 a.m. Yesterday.
我的朋友昨天上午10点打电话给我。
She entered the station twenty minutes before the train was due,
在火车进站20分钟前她就进了车站。