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来源:雅诚德英语网
The spread of flu by carrier is akin to flying people or birds, meaning regional variations can spread quickly around the world.
流感通过载体的传播就像是人们坐飞机或是鸟儿飞翔一样,意味着区域变异会很快传播到世界各地。
The spread of flu by carrier is akin to flying people or birds, meaning regional variations can spread quickly around the world.
流感通过载体的传播就像是人们坐飞机或是鸟儿飞翔一样,意味着区域变异会很快传播到世界各地。