n.體育館；健身房；體育課

We go to play badminton in the nearest gym every Sunday. 每個星期天我們都去最近的體育館打羽毛球。

He often went to the gym to harden his muscles. 他過去常到健身房鍛煉肌肉。

I did a two-hour workout in the gym. 我在健身房鍛煉了兩個小時。

You are supposed to wear sneakers in gym class. 體育課上你應該穿運動鞋。

gym作“健身房,體育館”解是非正式用法,在正式用法里應寫作gymnasium。