气象学家表示不可能完全解释清楚为什么会发生这些情况。

Meteorologists say it is impossible to explain fully how these things happen.

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美国国家航空和宇宙航行局的研究小组现在表示，他们已经证明，它们不可能是由爆炸本身产生的。

The NASA team is now saying they have proved that they could not have been produced by the blast itself.

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然而，消防官员表示，在大教堂结构被认定为安全之前，不可能对其损坏情况进行全面清点。

However, fire officers have said a complete inventory of the damage will not be possible until the cathedral structure has been deemed safe.

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Well, maybe I did imagine a world in which the Morning Star exists and the Evening Star doesn't exist, but maybe imagining doesn't mean it's possible.

或许我想象这一个,晨星存在,但昏星不存在的世界,但也许想象并不表示可能

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So, in particular, if you're person 1 and then "s-i" would be "s2, s3, s4" up to "sn" but it wouldn't include "s1."

具体来说如果你是参与人1那么,si-可能表示s2,s3,s4,直到sn,但是不包括s1

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