Several factors have been adduced to explain the fall in the birth rate.有几个因素已被援引来说明出生率降低的原因。The UK has the highest birth rate among 15 to 19-year-olds in Western Europe.在西欧，英国女性在15到19岁之间生育率最高。Women's total birth - ...
It was discussed that the technique of carbonization using limekiln gas and water glass.探讨了利用工业废弃物石灰窑气和水玻璃,采用碳化法制备白炭黑的工艺过程.The effects of impurities content on the CO 2 content in limekiln gas described.论述了影响石灰窑气除CO2外其它物...
The exiles had been cut off from all contact with their homeland.流亡者被切断了与家乡的所有联系。Many refugees have been forced to flee their homeland.很多难民被迫逃离了祖国。the Department of Homeland Security国土安全部...