cause-effect relationship为何物，于是束手无策，其实注意到现在分词结构当中宾语从句的谓语 remains to be shown即可索解，既然是一种有待证明的关系，当然要以谨慎态度（ caution）对待！
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However, their feasibility in a highly mobile pastoral setting remains to be shown.
然而，其在高流动牧区情况下的可行性还有待证明。
Whether gastrin has any functional direct effect on the parietal cell remains to be shown.
是否有任何功能胃泌素直接影响胃壁细胞仍有待证明。
Some people viewed the findings with caution, noting that a cause-and-effect relationship between passive smoking and cancer remains to be shown.
一些人谨慎得开待这些发现，他们认识到被动吸烟和癌症纸件的因果关系有待证实。
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