As a rule, however, the elevation of an animal to pet status removes it entirely from the human food chain.

但一般说来，当动物被拔高为宠物之后，它就不会再被人类列入食物链。

youdao

But the researchers are also concerned the resistant bacteria will find their way back into the human food chain.

研究者们担心，抗药性细菌会不会重回人类食物链。

youdao

The prion entered the human food chain without evident symptoms being observed - the pathogen was able to jump the species gap to humans.

在不引起可见的明显的症状的情况下，朊蛋白进入了人类的食物链，它可以跨过物种差异感染人类。

youdao

The biggest hazard of atmospheric tests was that radioactive fallout would get into the human food chain.

CNN: ASIANOW - Asiaweek

Or what if the transgenic animals somehow got into the human food chain?

ECONOMIST: REPORTS

She also said the news was a "very serious development" and demanded action to ensure that "illegal and carcinogenic horsemeat stops entering the human food chain".

BBC: Contaminated horsemeat sold for food, FSA admits