While no one knows for sure , scientists do exhibit a degree of certainty when predicting that future generations will face a dramatically diffrernt world .

没有人知道明确的答案，但是，科学家在预测后代将面对一个迥然不同的世界时确实有一定的把握。

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While no one knows for sure , scientists do exhibit a degree of certainty when predicting that future generations will face a dramatically diffrernt world .

没有人知道明确的答案，但是，科学家在预测后代将面对一个迥然不同的世界时确实有一定的把握。

youdao