They could see the grass-thatched shed lift and collapse, while a froth of foam cleared the crest of the sand and ran down to the lagoon.
他们瞧见那棚屋的草顶往上一掀，坍塌下来，一道溅着白沫的波浪越过沙堤，流进湖内。
2
In my case the limit on how tight was possible was collapse of the foam.
在我的情况，松紧程度的限制就是泡沫的崩溃。
3
For some time, a statement has spread in a large scale that "foam" of China's real estate will collapse, and residents will be in heavy debt with house purchasing.