一些条件提高了初级群体出现的可能性。

A number of conditions enhance the likelihood that primary groups will arise.

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例如，我们甚至不知道有多少恒星有行星，我们当然也不知道如果有适当的条件，生命自然出现的可能性有多大。

We do not even know, for example, how many stars have planets, and we certainly do not know how likely it is that life will arise naturally, given the right conditions.

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事实上，含糊其辞的中奖可能性要比获奖条件清晰明确的博彩更有效。

In fact, vaguely-stated possibilities of winning a prize were more effective than options with hard odds included.

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