Serotonin and its receptors exist extensively in gut.

羟色胺及其受体广泛分布于胃肠道。

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In sales, problems of secondary pollution and labels and signs exist extensively.

在销售过程中普遍存在二次污染和标签标识问题。

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The phenomena of sliding and loosening due to vibration exist extensively in engineering.

振动致滑和振动致松现象在工程中广泛存在。

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Essentially, do we farm extensively, using fewer inputs and more land, thus allowing some wildlife to co-exist on the same land as our farming?

FORBES: Genetic Modification: Proof that GM is Good for the Environment