It's hard to create a drug to suppress appetite when there could be many unknown factors involved in this instinct.

既然引起食欲的许多原因还有待发现，就很难发明一种药物来抑制食欲。

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Some unknown factors in natural diets such as bloodworm and squid may also play an important role in stimulating maturation through the endocrine system.

此外，沙蚕、鱿鱼等天然饵料中的一些未知因子也可能通过内分泌系统起关键的调控作用。

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Physical education forecast refers to the predictors prediction and deduction to all kinds of future or unknown factors in the field of physical education.

体育预测是指预测者对体育领域各种未来或未知因素进行预计和推断。

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Environmental factors along with genetics and unknown immunologic factors are believed to play a role in the development of autism.

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He follows the long academic tradition of overturning the conventional wisdom on a topic, showing that previously unknown or unanticipated factors contribute to the issue in question.

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By randomizing patients, almost all factors (known or unknown) that might influence the outcome are present in equal proportions in the various treatment groups.

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