Optional extras
[化] 任选附件
🧩 词语组成解析
[计] 附加设备, 额外设备
🗣️ 情景例句
Tell me about your book.
谈谈你的书吧。
When poverty comes in at the door, love flies out at the window.
贫穷进门来，爱情飞窗外。
The wall has ears.
隔墙有耳。