Cycloids
(cycloid 的复数) n. 摆线, 轮转线\\na. 圆形的, 循环性格的
🗣️ 情景例句
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
The young wheat sprouted quickly after the rain.
雨后，新鲜的麦芽迅速的长了出来。
So then what happened?
后来怎么样？