這些野牛較其低緯同類體型更大
[00:07:12]and the largest land animals in North America.
是北美洲最大的陸生動物
[00:10:08]For generations, wolves and bison here
狼與野牛在此代代抗衡
[00:13:29]have been shaped by their battles with each other,
于是得以進(jìn)化
[00:16:51]making each the most impressive of its kind.
成為同物種的佼佼者
[00:22:16]The bison will not stay long among the trees.
野牛不會在林中棲息過久
[00:25:34]They're not safe here.
這里并非安全地帶
[00:28:30]The wolves are closing in,
狼群逐漸靠近
[00:35:37]but their chance of ambushing the bison in the woods has passed.
可惜在林中伏擊野牛的機(jī)會業(yè)已喪失
[00:39:18]Their prey are now in the open
獵物已進(jìn)入空曠區(qū)域
[00:41:14]and grouped together for safety.
結(jié)伴而行 以保安全
[00:43:13]The wolves will need to work as a team
狼群若想一擊成功
[00:49:41]if they are to make a kill.
便需要協(xié)作作戰(zhàn)
[00:54:24]They circle the herd, trying to unsettle it
它們呈圍攻之勢 企圖擾亂陣腳
[00:56:55]and split it up.
進(jìn)而各個擊破
[00:58:29]But the bison are armed and dangerous.
不過野牛角鋒銳利 相當(dāng)危險
[01:00:49]They will be safe as long as they stick together.
如能互為犄角 便可保持不敗
[01:03:17]The wolves up their game, harrying the herd,
狼群讓戰(zhàn)斗升級 率先挑釁
[01:12:24]a ploy to trigger a stampede
先對牛群進(jìn)行騷擾
[01:14:15]and split away one of the smaller ones.
從而孤立出一個孱弱者
[01:19:22]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
[01:22:06]horns pointing outwards.
它們的角朝外