英语听力：自然百科 大迁徙 Great Migrations—7
时间：2019-01-22 作者：英语课 分类：自然百科2010年
英语课
Then the brilliant masses take to the wing, heading to a place they've never been. Their only map, imprinted 1 on their genes 2. A mysterious interplay of sun on eyes and antennae 3, an uncanny sense of magnetic north guides the way.
It will take five months for three generations to get the species as far north as Canada and a fourth super-generation to get them back to Mexico. Such a multi-generational migration 4 is incredibly rare. It takes the leading generation three weeks to fly 500 miles into the southern U.S..
These intrepid 5 elders sense the deaths are approaching fast. There is urgency now to pass on the migratory 6 baton 7. The female, having carried her eggs from Mexico, now searches for the monarch’s life-giving grail.
The milkweed sprouting 8 all around, her offspring will be laid on it, hatch on it, nurse on its toxic 9 milk and become toxic themselves, a defense 10 they will flaunt 11 with their singular beauty.
She is dying, but with luck, her children, grandchildren and great grandchildren will carry on the journey as far north as Canada and then an astounding 12 2,000 miles back to Mexico.
v.盖印（imprint的过去式与过去分词形式）
- The terrible scenes were indelibly imprinted on his mind. 那些恐怖场面深深地铭刻在他的心中。
- The scene was imprinted on my mind. 那个场面铭刻在我的心中。 来自《简明英汉词典》
n.基因( gene的名词复数 )
- You have good genes from your parents, so you should live a long time. 你从父母那儿获得优良的基因，所以能够活得很长。 来自《简明英汉词典》
- Differences will help to reveal the functions of the genes. 它们间的差异将会帮助我们揭开基因多种功能。 来自英汉非文学 - 生命科学 - 生物技术的世纪
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。
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。
adj.无畏的，刚毅的
- He is not really satisfied with his intrepid action.他没有真正满意他的无畏行动。
- John's intrepid personality made him a good choice for team leader.约翰勇敢的个性适合作领导工作。
n.候鸟，迁移
- Many migratory birds visit this lake annually.许多候鸟每年到这个湖上作短期逗留。
- This does not negate the idea of migratory aptitude.这并没有否定迁移能力这一概念。
n.乐队用指挥杖
- With the baton the conductor was beating time.乐队指挥用指挥棒打拍子。
- The conductor waved his baton,and the band started up.指挥挥动指挥棒，乐队开始演奏起来。
v.发芽( sprout的现在分词 )；抽芽；出现；（使）涌现出
- new leaves sprouting from the trees 树上长出的新叶
- They were putting fresh earth around sprouting potato stalks. 他们在往绽出新芽的土豆秧周围培新土。 来自名作英译部分
adj.有毒的，因中毒引起的
- The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
- There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
n.防御，保卫；[pl.]防务工事；辩护，答辩
- The accused has the right to defense.被告人有权获得辩护。
- The war has impacted the area with military and defense workers.战争使那个地区挤满了军队和防御工程人员。
vt.夸耀，夸饰
- His behavior was an outrageous flaunt.他的行为是一种无耻的炫耀。
- Why would you flaunt that on a public forum?为什么你们会在公共论坛大肆炫耀？
adj.使人震惊的vt.使震惊，使大吃一惊astound的现在分词)
- There was an astounding 20% increase in sales. 销售量惊人地增加了20%。
- The Chairman's remarks were so astounding that the audience listened to him with bated breath. 主席说的话令人吃惊，所以听众都屏息听他说。 来自《简明英汉词典》