英语听力：自然百科 大迁徙 Great Migrations—12
时间：2019-01-22 作者：英语课 分类：自然百科2010年
英语课
It takes four days for the larva to emerge. It gorges 1 on its own egg case, before turning to tender milkweed. It must grow fat, build up its reserves for the long migration 2 ahead. After two weeks of manic feasting, its body mass now 2,000 times what it was at birth. The caterpillar 3 is ready. Anchored by silk, it begins its miracle.
Over the next two weeks, the caterpillar literally 4 dissolves into a bag of rich fluid. Its cells sprout 5 anew, giving rise to wings, legs, antennae 6... and then...
After a scant 7 few hours, it's ready to fly. This is a creature truly born to move, born to outstrip 8 its parents and grandparents' heroic efforts, carrying aloft the genetic 9 hopes of the species. Incredibly, more than a billion super monarchs 10 are now taking off. And for the first time in four generations, they're heading south, heading for their winter home.
n.山峡，峡谷( gorge的名词复数 )；咽喉v.（用食物把自己）塞饱，填饱( gorge的第三人称单数 )；作呕
- The explorers were confronted with gorges(that were)almost impassable and rivers(that were)often unfordable. 探险人员面临着几乎是无路可通的峡谷和常常是无法渡过的河流。 来自辞典例句
- We visited the Yangtse Gorges last summer. 去年夏天我们游历了长江三峡。 来自辞典例句
n.迁移，移居，（鸟类等的）迁徙
- Swallows begin their migration south in autumn.燕子在秋季开始向南方迁移。
- He described the vernal migration of birds in detail.他详细地描述了鸟的春季移居。
n.毛虫，蝴蝶的幼虫
- A butterfly is produced by metamorphosis from a caterpillar.蝴蝶是由毛虫脱胎变成的。
- A caterpillar must pass through the cocoon stage to become a butterfly.毛毛虫必须经过茧的阶段才能变成蝴蝶。
adv.照字面意义，逐字地；确实
- He translated the passage literally.他逐字逐句地翻译这段文字。
- Sometimes she would not sit down till she was literally faint.有时候，她不走到真正要昏厥了，决不肯坐下来。
n.芽，萌芽；vt.使发芽，摘去芽；vi.长芽，抽条
- When do deer first sprout horns?鹿在多大的时候开始长出角？
- It takes about a week for the seeds to sprout.这些种子大约要一周后才会发芽。
n.天线；触角
- Sometimes a creature uses a pair of antennae to swim.有时某些动物使用其一对触须来游泳。
- Cuba's government said that Cubans found watching American television on clandestine antennae would face three years in jail.古巴政府说那些用秘密天线收看美国电视的古巴人将面临三年监禁。
adj.不充分的，不足的；v.减缩，限制，忽略
- Don't scant the butter when you make a cake.做糕饼时不要吝惜奶油。
- Many mothers pay scant attention to their own needs when their children are small.孩子们小的时候，许多母亲都忽视自己的需求。
v.超过，跑过
- He can outstrip his friend both in sports and in studies.他能在体育和学习方面胜过他的朋友。
- It is possible for us to outstrip the advanced countries in the world.我们能超过世界上先进的国家。
adj.遗传的，遗传学的
- It's very difficult to treat genetic diseases.遗传性疾病治疗起来很困难。
- Each daughter cell can receive a full complement of the genetic information.每个子细胞可以收到遗传信息的一个完全补偿物。