温牛奶是细菌理想的滋生地。Warm milk is the ideal breeding ground for bacteria.他们发现了一种肉眼可见的细菌。They found a bacterium visible to the human eye.细菌通过分裂和自我复制来繁殖。Bacteria reproduce by dividing and making copies of themselves....
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...