With the increase of the vehicle amount, traffic accident occurrence frequency in China has risen.
随着汽车总量的增长，我国已成为交通事故发生频率最高的国家之一。
Besides the pathogen amount, the climate was also the important factor to the disease occurrence.
除菌源量外，气候条件也是发病的重要因素。
Besides the pathogen amount, the climate was also the important factor to the disease occurrence.
除菌源量外，气候条件也是发病的重要因素。
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