Maintenance definition
[计] 维护定义, 维护确定, 维护规定
🧩 词语组成解析
🗣️ 情景例句
My friend's a chain smoker.
我的朋友烟瘾很重。
This window is just as wide as that one.
这扇窗户就象那一个一样宽。
The firm closed down because there wasn't enough demand for its product.
工厂关门了，因为产品供过于求。