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Some herds travel 2000 miles a year in search of fresh pastures.This is the longest overland migration made by any animal.They're constantly on the moves.New born cubs have to be up and running the day they are born.But the vast herds do not travel alone.
当你看到这条评论时 你的英语已经接近150了
Wolves,packs of them 8 to 10 strong,shadow the migration.And they're hungry.It's the newly born cubs there they are after.Running directly of the herd is the ploy to generate panic.The herd breaks up and now it's easier to target an individual.In the chaos,
a calf is separated from its mother.The calf is young,but it can out run of wolf if only it manages to keep its footing.At this stage,the odds are even,either the caribou would make mistake or after a mile the wolf will give up.比狼快始终听不出来，帮忙纠错，共同进步
