Nancy Clark, assistant commissioner for environmental disease prevention at the New York City Health Department, said one suspect, a new ventilation system at the school, did not appear to be a cause.

纽约卫生署环境疾病防治助理处长Nancy Clark提到一个疑点，就是学校一个不引人瞩目的新通风系统。

youdao

Hi Michele -- In order to answer your question, I turned to a leading sports nutritionist, Nancy Clark M.

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