Metacenter
n. 定倾中心, 外心点
🗣️ 情景例句
a way to encourage reading.
鼓励阅读的办法。
How much?How many?
共多少？
Usually, he catches the number 11 bus to work, but sometimes he goes by train.
通常他乘11路公共汽车去上班，不过他有时乘火车去。