对于这些维生素是否能预防癌症，尚无定论。

___The ___jury ___is ___still ___out on whether these vitamins protect against cancer.

我认为对于电视和其他媒体的影响，尚无定论。

I think that ___the ___jury ___is ___still ___out on the effects of television and other media.

对于气候变化的长期后果，尚无定论。

___The ___jury ___is ___still ___out on the long-term consequences of climate change.