目前还不清楚这种蛋白质是否对人类也起到相似作用。
It is still unknown if the protein plays a similar role in people.
两种药物相互作用产生这种结局的机制尚不清楚。
Exactly how the two drugs interact to produce this result is not yet clear.
事实上，人们远不清楚这项政策是否会以及如何产生作用。
In fact, it is far from clear whether, and how, such a policy might work.
我并不清楚这种作用有多大和为什么。
罗斯也说，现在还不清楚基因在这里起了什么作用。
Rose also cautioned that not enough is known, yet, about what role the genes play.
但研究人员目前尚不清楚其发挥作用的机理。
But the researchers it is not clear the mechanism of their role.
可乐宁发挥中枢作用的确切部位尚不清楚。
The exact site at which clonidine exerts this central effect is not precisely known.
丙酮酸的作用机制尚不清楚。
咖啡中起到可能的保护作用的成分目前还不清楚。
The coffee ingredients responsible for the possible protective effect remain unclear.
到目前为止，PCP的内分泌干扰作用的具体机制还不清楚。
So far, the specific mechanism of PCP endocrine disruption is not clear.
然而精确的作用位点和突触功能障碍的性质仍然不清楚。
However, the precise site and nature of the synaptic dysfunction remain unknown.
然而精确的作用位点和突触功能障碍的性质仍然不清楚。
However, the precise site and nature of the synaptic dysfunction remain unknown.
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