自然发病率
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natural infection rate
自然感染率
以上为机器翻译结果,长、整句建议使用 人工翻译 。
The morphology, species frequency, spore density and natural infection rate of the VAM fungi in tea gardens were studied in the southern parts of Henan province.
对豫南茶园VA菌根真菌形态、种类、种群频度、孢子密度及自然侵染率进行观察与测定。
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Both the change in the death rate and the change in the infection rate are partly a consequence of the natural flow and ebb of any epidemic infection.
ECONOMIST: AIDS
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