Where I found the glass aerolite was a sinkhole long ago and it was fulfilled with outside materials through long long term.
我发现玻璃陨石卵石的地方就是一个古老的地下洞穴，后来被冲积物填平了。
2
These are very lofty goals but if carried out, Recycled Island would turn the trash into a money making enterprise rather than an economic sinkhole.
这些都是很高远的目标，一旦实现，再生岛就能变废为宝，财源滚滚，而不会变成一个资金黑洞。
3
The paper stated the water inrush model of shearing failure at the karst sinkhole bottom in North China coal field and analyzed the water inrush mechanism of the karst sinkhole.