[by:可可英语～www.utensil-race.com]
[00:00:01]Her destination is Mexico
它的目的地是墨西哥
[00:05:34]and one small and special group of trees.
和一小群独特的树木
[00:08:51]No-one knows how she finds them, in these great mountain forests.
在这大片的山林里 谁也不知道它是怎么找到的
[00:17:45]She joins other monarch butterflies
它和其他帝王斑蝶作伴
[00:20:09]that have travelled here from all over North America.
一路飞越北美到这儿来
[00:28:34]Countless butterflies crowd these particular trees,
数之不尽的蝴蝶 聚集在这些树上
[00:40:46]hanging from every branch.
悬挂在每根枝娅上
[00:43:09]They come here because, although winter brings a chill to the air,
它们飞到这儿来 是因为尽管冬天的空气变得冷冽
[00:47:30]there will not be a lethal freeze as there will in Canada.
还不至于像加拿大那样 把它们冻死
[00:51:56]The conditions are perfect for hibernation.
这里的环境最适合冬眠
[01:02:43]Hibernating butterflies are vulnerable to predators.
冬眠的蝴蝶 是掠食动物眼中的肥羊
[01:07:22]But monarchs are poisonous.
但帝王斑蝶带有毒性
[01:09:33]However, a few birds have learned to rip out the toxic parts and eat the rest.
不过有些鸟儿 学会扯掉有毒的部分
[01:15:04]They kill hundreds of thousands of butterflies
把剩下的吃进肚里 几千只蝴蝶死在它们手里
[01:17:42]and dislodge many more.
被赶走的更多
[01:23:31]Those that fall must get back into the trees before nightfall brings another killer.
落下的蝴蝶必须回到树上 否则夜里又出现另一个杀手
[01:29:53]They vibrate their wings to warm their flight muscles.
它们振动翅膀为飞行肌肉加温
[01:32:46]But it's a race against time.
但这是一场和时间的赛跑
[01:39:57]Night brings a lethal ground frost.
夜晚带来致命的地面霜