Backs
n. 后背, 脊背；后卫（back的复数形式）
🗣️ 情景例句
The best way to promote your products is through advertising.
推广产品最好的方法就是买广告。
What month is this?
现在是几月？
I slipped and fell downstairs.
我滑了一跤，从楼梯上摔下来了。