"sags" in Chinese (Simplified)
下垂下陷
Definition
'Sags' 是动词 'sag' 的第三人称单数形式，意思是某物因为脆弱、沉重或支撑不良而下垂或下陷。
Usage Notes (Chinese (Simplified))
常用于描述物体（如屋顶、线、家具）由于重力、老化或支撑不够而下垂、弯曲。一般不用于表达人的情绪低落。风格较中性、正式。
Examples
The old couch sags in the middle.
那张旧沙发中间**下垂**了。
The power line sags after the storm.
暴风雨后，电线**下垂**了。
The cake sags in the oven if you open the door too early.
如果你太早开烤箱门，蛋糕会**塌陷**。
You can tell the mattress is old because it really sags where you sleep.
你能看出来这床垫很旧，因为你睡的地方真的**陷下去了**。
His backpack sags whenever he carries those heavy books.
他背那些重书包的时候，背包就会**下垂**。
The old fence sags a bit in the middle, but it's still holding up.
那道旧篱笆中间有点**下垂**，但还撑得住。