The results showed that the radioactivity levels of each nuclide in Yangtze River water system were still lower than that of background, and did not cause contamination.
结果表明，各核素均未对长江造成污染，长江水系放射性浓度仍在本底水平。
The results showed that the raioac-tivity levels of each nuclide in Yangtze River water system were still lower than that of background, and did not cause contamination.
结果表明，各核素均未对长江造成污染，长江水系放射性浓度仍在本底水平。
We monitored some background DNA in faecal DNA, and discussed potential risks from background DNA contamination, such as genomes of bacteria, virus, parasites and prey.
文中还对粪便DNA内细菌基因组等背景DNA可能对分子粪便学试验结果的影响进行了探讨。
We monitored some background DNA in faecal DNA, and discussed potential risks from background DNA contamination, such as genomes of bacteria, virus, parasites and prey.
文中还对粪便DNA内细菌基因组等背景DNA可能对分子粪便学试验结果的影响进行了探讨。
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