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In the past decade, air emissions have increased substantially..... while leaks from the toxic holding ponds into the surrounding water supply have more than quadrupled.
在过去的十年里，空气污染指数大幅飙升，与此同时有毒物质存贮池向周边水源供应处的排放额翻了两番。
Over the next seven years, oil production from here is expected to double.
在未来的七年里，这里的原油生产量将会翻一番。
How will this affect the wolves and buffalo? No-one knows for sure.
这会对狼群和野牛们造成什么影响？没人确切知道答案。
Winter brings me full circle with the wolves.
冬天让我和狼群们又见面了。
A year ago, I first met Storm and I've learned he is a truly impressive leader for his family.
一年前，我第一次遇见"风暴"，我认为牠是牠家族令人印象深刻的领导者。
He and Susie have kept all four pups alive.
牠和"苏西"确保了牠们四只幼狼全部存活。
And they've grown so much, it's hard to tell them now from the adults.
牠们已经完全长大了，很难从其牠成年狼群中辨别出牠们。
But have they learned any hunting skills from their parents?
但牠们从父母那学到捕猎本领了吗？
Winter is the season when the pack is at full strength.
冬季是狼群们蓄势待发的时节。
All of the wandering members of the family are back.
所有游荡的家族成员都回来了。
And now is the time when they can really bring down large prey.
现在是牠们撂倒大型猎物的真正时刻。
