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These bison are even bigger than their southern cousins
這些野牛較其低緯同類體型更大
and the largest land animals in North America.
是北美洲最大的陸生動物
For generations, wolves and bison here
狼與野牛在此代代抗衡
have been shaped by their battles with each other,
于是得以進化
making each the most impressive of its kind.
成為同物種的佼佼者
The bison will not stay long among the trees.
野牛不會在林中棲息過久
They're not safe here.
這里并非安全地帶
The wolves are closing in,
狼群逐漸靠近
but their chance of ambushing the bison in the woods has passed.
可惜在林中伏擊野牛的機會業(yè)已喪失
Their prey are now in the open
獵物已進入空曠區(qū)域
and grouped together for safety.
結伴而行 以保安全
The wolves will need to work as a team
狼群若想一擊成功
if they are to make a kill.
便需要協(xié)作作戰(zhàn)
They circle the herd, trying to unsettle it
它們呈圍攻之勢 企圖擾亂陣腳
and split it up.
進而各個擊破
But the bison are armed and dangerous.
不過野牛角鋒銳利 相當危險
They will be safe as long as they stick together.
如能互為犄角 便可保持不敗
The wolves up their game, harrying the herd,
狼群讓戰(zhàn)斗升級 率先挑釁
a ploy to trigger a stampede
先對牛群進行騷擾
and split away one of the smaller ones.
從而孤立出一個孱弱者
The bison form a defensive circle around their young,
野牛們以幼崽為中心 組成防御性外圍
horns pointing outwards.
它們的角朝外
