The question is not regarding the validity of speciation.
这个问题与物种形成论的正确性无关。
A third risk is that consumers may infer the intended conclusion but question the validity of their inference.
第三个风险是,消费者可能会推断出预期的结论,但对其推论的有效性提出质疑。
But question are raised about the validity of the research and the ability to follow a draconian diet.
但人们对于研究的效度以及是否能够严格遵循那么苛刻的食谱尚存有异议。
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