The etiology is yet unknown. It appears to be related to some functional factors.
其病因尚不明，其发作可能与功能因素有某些关系。
It is yet unknown when exactly Dooku abandoned himself to the dark side of the Force, though he had apparently experimented with forbidden lore in the past.
现在仍然不知道杜库到底是何时投入了原力黑暗面，但他显然在过去尝试过那些禁断的知识。
我最好的一天是未知的。
However, till now it is yet unknown how L-selectin and PSGL-1 initiate similar signaling pathways, nor any crosslinking between the two pathways has been found.
然而，目前还没有明确L -选择素和PSGL - 1如何引起相似的信号途径，也没有找到这两条信号通路的整合点。
However, till now it is yet unknown how L-selectin and PSGL-1 initiate similar signaling pathways, nor any crosslinking between the two pathways has been found.
然而，目前还没有明确L -选择素和PSGL - 1如何引起相似的信号途径，也没有找到这两条信号通路的整合点。
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