✅ 同义词
🗣️ 情景例句
Aren't you going to the aerobics class this morning?
今天上午你不是去上有氧运动课吗？
It's up to us to help those in need.
我们有责任帮助那些有困难的人。
Then he remembered his comrade downstairs.
然后他想起楼下的同志。