A puma will not attack a human being unless it fells itself to be in a trap.
美洲狮不会攻击人类除非它感到它被设计了。
Experts confirmed that a puma will not attack a human being unless it is cornered.
专家们证实，美洲狮除非被逼入困境否则不会攻击人类。
It immediately ran away when she saw it, and experts confirmed that a puma will not attack a human being unless it is cornered.
当她看到它时，它便跑开了。而且专家证实，美洲狮除非被逼到绝境，它是不攻击人的。
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