Pendulums
n. 摆, 钟摆( pendulum的名词复数 ); 摇摆不定的事态（或局面）
🗣️ 情景例句
First word ...
第一个字……
Be practical!
实际一点吧！
There were no classes this afternoon. My classmates all went to People's Park.
今天下午没有课。同学们都到人民公园去了。