除非我们采取行动，否则我们则面对更加恐惧的未来。
And unless we act, we are confronting an even more frightening future.
野生动物将会濒临灭绝，除非我们采取行动保护它们。
If we don't take action to protect the wild animals, they will die out.
除非我们采取行动，夏季冰层将可能在35年短的时间内全部消失。
Unless we take action, summer ice could be completely gone in as little as 35 years.
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