The biting winter winds that clear the snow produce a wind chill that would kill most mammals. But musk oxen are made for this, cocooned in double-layered coats. But cold is not the only danger in this windswept land. The herd reacts and runs for higher ground.
1 herd
n.兽群，牧群;vt.使集中，把…赶在一起
参考例句：
She drove the herd of cattle through the wilderness.她赶着牛群穿过荒野。
He had no opinions of his own but simply follow the herd.他从无主见，只是人云亦云。
2 dominant
adj.支配的，统治的;占优势的;显性的;n.主因，要素，主要的人(或物);显性基因
参考例句：
The British were formerly dominant in India.英国人从前统治印度。
She was a dominant figure in the French film industry.她在法国电影界是个举足轻重的人物。
3 mammoth
n.长毛象;adj.长毛象似的，巨大的
参考例句：
You can only undertake mammoth changes if the finances are there.资金到位的情况下方可进行重大变革。
Building the new railroad will be a mammoth job.修建那条新铁路将是一项巨大工程。
4 tusks
n.(象等动物的)长牙( tusk的名词复数 );獠牙;尖形物;尖头
参考例句：
The elephants are poached for their tusks. 为获取象牙而偷猎大象。
Elephant tusks, monkey tails and salt were used in some parts of Africa. 非洲的一些地区则使用象牙、猴尾和盐。 来自英语晨读30分(高一)
5 musk
n.麝香, 能发出麝香的各种各样的植物，香猫
参考例句：
Musk is used for perfume and stimulant.麝香可以用作香料和兴奋剂。
She scented her clothes with musk.她用麝香使衣服充满了香味。
6 cocooned
v.茧，蚕茧( cocoon的过去式和过去分词 )
参考例句：
The doctors cocooned the patient in blankets. 医生们将病人紧包在毯子里。 来自辞典例句
I cocooned in my own kingdom. 我完全沉迷在我自己的王国中。 来自辞典例句
