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These permanent holes in the ice provide seafood throughout the winter.
這個長年不凍的水窟窿提供了整整一個冬天的食物。
The diners attract others.
其它生物也似乎聞風而來。
In the Arctic, any breach in the icy barrier can be a lifeline.
在北極，每一處破冰的地方都是一條生命線。
Musk oxen create their own.
麝牛創(chuàng)造了自己的生命線。
These giants have the strength to smash through the frozen crust to graze on the vegetation below.
這種體型巨大的動物有足夠的力量砸出冰窟窿，再吃下面的植物。
The ice-breakers create an opening for other over-winterers.
麝牛破冰也為其它越冬的動物創(chuàng)造機會。
Flocks of ptarmigan make unusual grazing companions for the musk oxen,
成群的雷鳥與麝牛結(jié)成了緊密的伙伴關(guān)系，
whose entourage grows throughout the day.
它們的活動忙碌一整天。
This odd assembly of vegetarians doesn't go unnoticed. An arctic fox.
這些食草動物組成的奇特群落當然會引起注意。一頭北極狐。
The musk oxen have recently given birth.
麝牛最近生了幼仔。
For the fox, it's a chance to scavenge.
對于北極狐來說，這是一個捕食的機會。
But half a ton of mad hairy cow is not to be trifled with.
不過在半數(shù)是脾氣暴躁的母牛面前不好硬來。
