Backs
n. 后背, 脊背；后卫（back的复数形式）
🗣️ 情景例句
Sorry, but she is out for lunch right now.
抱歉，她现在出去吃午饭了。
There are four quarters in every dollar.
每美元有四个二角五分。
Then you can pick up a hire car and travel around.
然后你可以开着租来的车四处旅行。