It was unbelievably dramatic as lightning crackled all round the van.闪电在货车周围炸开时，情景异常壮观。Suddenly a bolt of lightning crackled through the sky.突然一道闪电划破长空。There was frequent thunder and lightning, and torrential rain.雷电交加，大...
People mingled happily at the carnival.大家在狂欢节交往得很快乐。Towards evening the carnival entered its final stage.临近傍晚时，狂欢节进入最后阶段。Our street puts on a carnival every year.我们街的居民每年举行一次嘉年华会。It's like one enormous street carniv...
Leaching of copper from chalcocite with acidic acetonitrilecopper sulphate system was studied.研究了用酸性乙腈硫酸铜体系从辉铜矿中提取铜.The deep oxidation and groundwater leaching solubilizes much of the loosely bound uranium.深部氧化和地下水淋蚀使大部分...