一般认为，超过一半的石油储量分布在3个地理区域——西西伯利亚盆地，东白令盆地以及阿拉斯加的北极圈以内地区。
More than half the oil reserves are believed to occur in three geologic areas - the West Siberian Basin, the East Barents Basins and Arctic Alaska.
类似的足迹识别软件已经被用于为白犀牛、北极熊以及印度豹制作生物签名。
Similar footprint-recognition software has been used to create biometric signatures for white rhinos, polar bears, and cheetahs as well.
种几种颜色不同的花——红色的“北极星”，深粉红和白色花的“蛱蝶花”，还有纯白色的“白美人“。
Grow a few plants of several different coloured varieties - a red 'Polestar', deep pink and white, 'Painted Lady' and a pure white 'White Lady'.
种几种颜色不同的花——红色的“北极星”，深粉红和白色花的“蛱蝶花”，还有纯白色的“白美人“。
Grow a few plants of several different coloured varieties - a red 'Polestar', deep pink and white, 'Painted Lady' and a pure white 'White Lady'.
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