we are sure that mystery will be fully explained some day by human beings
( )( )( )( )the mystery will be fully explaint some day ……
人气：125 ℃ 时间：2020-06-05 04:26:34
解答
不能说it is sure that...,要说也只能说It is certain that...,但是都把原句的we的含义给漏掉了.
所以最好改成：
1.We are certain that...
2.We make sure/certain that...
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