sag
verb [ I ] uk/sæɡ/ us/sæɡ/ -gg-
（中部）下垂，下陷
to drop down to a lower level in the middle
The shelf sagged under the weight of the heavy books. 搁板被沉重的书压弯了。
a sagging roof/floor/bed 下陷的屋顶／地板／床
减弱；下降，下跌
to become weaker
The dollar held up well this morning but the pound sagged. 今天上午美元坚挺，但英镑下跌了。
sag
noun uk/sæɡ/ us/sæɡ/
(DROP)
[ S or U ]下垂部分；下弯部分；下陷部分
a movement or position in which something has dropped down to a lower level
a sag in the roof 屋顶的下陷部分
[ C usually singular ]下降，下跌
a reduction in something
a sag in sales 销售量的下降
(FOOD)
[ U ]（同 saag）
→ saag