“下陷”造句

床垫是否高低不平并且下陷？
Is the mattress lumpy and saggy?

那意味着整个房子正在下陷吗？
Does that mean the whole house is subsiding?

黑色的拎包由于装了各种形状的东西而中间下陷.
The black reticule sagged under the weight of shapeless objects.