煤矿中天然存有高爆气体。Highly explosive gas is naturally found in coal mines.许多人到煤矿来,是因为契约规定必须服务几年.Many people came to the coal mineindentured for several years.煤矿工人须在地下工作.Coal miners have to work under the ground....
I agree that the demise of London zoo would be terrible.我也认为如果伦敦动物园不复存在的话那真是太糟糕了。He praised the union's aims but predicted its early demise.他赞扬协会的目标,但预期这一协会很快会消亡.The war brought about the industry's sudden demi...