Excessive amounts of lead in the blood can cause damage to the digestive, nervous and reproductive systems, and also stomach aches, anaemia and convulsions.

血铅超标对消化、神经、生殖系统都有严重影响，同时可引发胃痛、贫血和痉挛。

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Some researchers are convinced that ingesting the chemical can interfere with development of the reproductive and nervous systems and possibly promote cancer.

一些研究者认为，摄取这种物质会影响生殖系统和神经系统的发育，并有可能诱发癌症。

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The virus can infect any type of epithelial, or surface cell, which are found throughout the digestive, reproductive, respiratory and urinary systems.

病毒可以影响任何上皮或表皮的癌症类型，不管是在消化系统、生殖系统、呼吸系统还是泌尿系统。

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The researchers found that PQQ is important in the reproductive and defense systems of mice.

VOA: special.2009.04.21

In adults, the chemicals may disrupt immune systems and reproductive function.

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These chemicals speed up your heart-rate, shut down your immune system, digestion, and reproductive systems, allowing you to use all the energy that would usually go toward, say, digesting a granola bar for swimming like hell to the beach.

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In large doses, mercury contamination can affect the health and populations of fish and wildlife, as it harms their central nervous and reproductive systems.

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