Backs
n. 后背, 脊背；后卫（back的复数形式）
🗣️ 情景例句
Well, for one thing, he's my sister's boyfriend. Ann talks about Jack all the time.
首先，他是我妹妹的男朋友。安整天就是杰克长杰克短的。
If she could help you, she would help you.
如果她能帮你的话，她会帮你的。
How many instruments do you play?
你能演奏多少种乐器？