sag
v
(-gg-) [I]
1 sink or curve down in the middle under weight or pressure (因负重或受压)向下凹或中间下陷
a sagging roof 下陷的屋顶
The tent began to sag as the canvas became wet. 帐篷因帆布湿了中间有些下坠.
2 hang loosely or unevenly 松弛或不整齐地悬著
old torn curtains sagging at one end 垂在一端的破旧窗帘
Your skin starts to sag as you get older. 人一老皮肤就松弛了. sag, n [U, sing]
extent to which sth sags; sagging 下陷或松弛的程度; 下陷或松弛
too much sag in the mattress 床垫过於松弛
a sag in the seat of the chair 椅子座位部分的凹陷.
Yes, I see. How can they get rid of waste water in this way? What a terrible colour the sea is now! It looks as if our class won't be able to bathe at all.
是的,我看见了。他们怎么能这样排放废水呢?海水的颜色多么可怕呀!看来我们班同学根本不能在这里游泳。
If you hate science stories, you are unlikely to enjoy reading them in English.