of Migration
美音、自然拼读、分级阅读与词汇复习
Table of Contents Introduction.
导言表。
4 What Is Migration?
4 什么是移徙?
5 The Search for Food and Water.
5"寻找食物与水".
8 Finding a Place to Nest.
8 寻找巢穴的地方。
10 How Do They Do It?
他们怎么做到的?
11 Insects, Whales, and Turtles.
11 昆虫、鲸和龟。
13 Glossary.
13 词汇。
16 Index.
16 指数。
16 Introduction Some animals wing their way across the skies for hundreds or thousands of miles.
16 导言 一些动物横跨了天空数百或数千英里
Others thunder across great plains.
其他雷声穿过了大平原
And still others make their way through strong ocean currents.
还有其他人通过强烈的洋流。
All are searching for food, water, warmer climates, or a place to raise their young.
他们都在寻找食物、水、温暖的气候,
And all are taking part in the magic journey of migration.
所有人都参加了移徙的神奇旅程。
Geese head south for warmer climates in the fall.
雁头向南为秋季更温暖的气候.
What Is Migration?
什么是移徙?
Migration is the term scientists use to describe these animal journeys.
迁徙是科学家用来描述这些动物出行的术语.
And many different types of animals migrate.
而许多不同类型的动物迁徙.
Birds, bats, whales, sea turtles, large grazers such as caribou and wildebeests, salmon, and even some kinds of insects move from one place to another to survive.
鸟类,蝙蝠,鲸鱼,海龟等大型格拉斯人,如驯鹿和野蜂,鲑鱼等,甚至有的昆虫从一地迁徙到一地生存.
Some animals migrate at the same time every year and follow the same path.
一些动物每年会同时迁徙并走同道.
Others follow more irregular patterns because their movement depends on local conditions, such as the weather.
另一些则遵循更不规则的模式,因为它们的行走取决于当地的条件,例如天气.
There are also some animals that only migrate one-way, such as masses of locusts that migrate when their numbers get so big that they need to find new sources of food.
也有一些动物只单向迁徙,例如大量蝗虫在其数量变得如此之大而需要寻找出新的食物来源时会迁徙.
They stay in a new field until they need another source of food.
他们留在新地里,直到他们需要另一种食物来源.
Pilot whales migrate.
飞行员鲸鱼迁徙.
Locusts swarm a new feeding ground.
龙虾会聚集一个新的喂养地
Migration is one of the most dangerous journeys an animal can make.
迁徙是动物最危险的旅程之一
Migrating animals face many threats along the way, including hungry predators, strong winds, ocean currents, hunters, and fishermen.
沿途迁徙的动物面临许多威胁,包括饥饿的捕食者,强风,洋流,猎人和渔民.
But migrating to find better living conditions is important for survival.
但是,为了找到更好的生活条件而移徙对生存很重要。
The Search for Food and Water The most common reason why animals migrate is to find food and water.
寻找食物和水 动物迁徙最常见的原因是寻找食物和水.
One of the most spectacular examples can be found in Africa.
在非洲可以找到最引人注目的例子之一。
Every year more than a million wildebeests, which are large, grazing animals, migrate because of drought.
每年有超过一百万个野生蜂,它们都是大型,放牧的动物,由于干旱而迁徙.
When hot weather dries up grass and water supplies in one place, these fast-on-their-feet wildebeests travel in huge herds to find new sources of food and water.
当炎热的天气将草地和水供应干涸在一个地方时,这些快脚的野生蜂群会大跑去寻找新的食物和水源。
As these large mammals thunder across the great plains of eastern Africa, hundreds of thousands of zebras and gazelles join them on their journey.
当这些大型哺乳动物在东非大平原上打雷时,数十万只斑马和瞪羚会与他们一起踏上旅程.
Hungry bears are a threat to migrating salmon.
饥饿熊是对迁徙的鲑鱼的威胁.
Many birds also make spectacular journeys to find the food they need.
许多鸟类还进行了壮观的旅程来寻找需要的食物.
Warblers, flycatchers, storks, pelicans, terns, and all kinds of other birds migrate every year to find food.
花生,蝇子,stor, p, ter等各种鸟类每年都会迁徙去寻找食物.
Finding a Place to Nest Another reason animals migrate is to find a place to lay their eggs or to raise their young.
动物迁徙的另一个原因是 寻找产卵的地方 或养育幼年的动物
Many fish, such as salmon and trout, migrate to spawn, or lay their eggs, in freshwater streams.
许多鱼类,如鲑鱼和鳟鱼,迁移到淡水溪中产卵或产卵。
And some, such as freshwater eels, do the opposite, leaving their freshwater homes and migrating to the open sea to spawn.
而一些,如淡水鳗鱼,则相反,离开他们的淡水家园并迁徙到公海去产卵.
Every year Arctic Terns fly 22,000 miles on these migration routes from the Arctic, where they nest, all the way to Antarctica, where they spend the winter.
每年北极特恩斯从北极飞出22,000英里的迁徙路线,它们在那里筑巢,一直到南极洲,在那里过冬.
Antarctica N Female salmon To move from freshwater to salt water, eels have a very special adaptation in their kidneys.
N. 雌性鲑鱼 为了从淡水转移到盐水,鳗鱼的肾脏有非常特殊的适应.
Without it, they wouldn’t survive the switch.
没有它,他们就无法活下来。
How Do They Do It?
他们怎么做到的?
How do animals find their way when they migrate?
动物迁徙时如何找到自己的方式?
Although scientists don’t have all the answers yet, they are learning more every year about the mysteries of migration.
尽管科学家们尚未掌握所有答案,
Some animals, such as salmon, use their sense of smell to find the stream where they were first born.
有的动物,如鲑鱼,用它们的嗅觉来发现它们最初所生的溪流.
Others, such as indigo buntings and other night-flying birds, use the stars to guide their way.
其他如indigoboutings和其他夜行鸟等则会用星来引导它们.
Day-flying birds use the sun and also watch for special landmarks, such as coastlines and mountains, to stay on course.
日出飞行的鸟类会使用太阳并也监视海岸线和山脉等特殊地标,以保持航道.
Scientists are still exploring other ways that animals navigate.
科学家们仍在探索其他动物的导航方式.
They believe some animals are able to sense Earth’s magnetic pull to guide them.
他们相信有些动物能够感知地球的磁力来引导它们.
North Pole South Pole Earth’s magnetic field acts like a giant magnet inside the Earth.
北极南极地磁场在地球内部的作用就像个巨大的磁铁.
Indigo Bunting Magnetic Brains Think of Earth as a giant magnet.
Indigo Bunting 磁脑 以为地为巨磁.
Scientists think that many species of birds navigate by sensing Earth’s magnetic north and south poles.
科学家认为许多鸟类通过感知地磁南北极来导航.
They have found tiny particles of a magnetic substance, magnetite, in some birds’ brains.
他们在一些鸟类的大脑中发现了磁性物质磁铁的微粒。
They think these tiny particles are pulled by Earth’s poles, helping guide birds as they migrate.
他们认为这些微小的粒子被地极拉出, 帮助引导鸟类迁徙。
Insects, Whales, and Turtles One of the most interesting yearly migrations is that of monarch butterflies.
昆虫、鲸和龟 每年最有趣的一次移民是君主蝴蝶。
These bright orange and black butterflies travel from the northern and eastern parts of North America to Mexico and southern parts of the United States.
这些亮橙色和黑色的蝴蝶从北美北部和东部去往墨西哥和美国南部.
They spend winter on specific trees in the mountains.
他们在山上的特定树木上过冬.
In the spring, the adults return north, breeding along the way.
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The adults die after the females lay eggs.
成年后雌性产卵而死.
The eggs develop into young butterflies that complete the journey back home.
卵会发育为年轻的蝴蝶,完成回家的旅程.
Many marine creatures also migrate—from huge humpback whales to lobsters, sharks, sea turtles, and tuna.
许多海洋生物也迁徙——从巨大的座头鲸到龙虾,鲨鱼,海龟和金枪鱼.
Some, such as many of the sea turtles, follow ocean currents to get from one part of the vast ocean to another.
有的,如许多海龟会跟随洋流从广阔的海洋的一地到达另一地.
But scientists still don’t know how these creatures find exactly the right beach to lay their eggs—the same one they hatched on years before.
但科学家仍不知道这些生物是如何找到合适的海滩产卵的,
Every year, millions of animals move from one place to another to find food, water, better weather, or a place to nest or raise their young.
每年有上百万个动物从一个地方迁徙到另一个地方去寻找食物,水,更好的天气,或者筑巢或抚养幼子的地方.
Some travel alone, but others travel in huge flocks or herds.
有的独自出行,有的则以巨大的羊群或牧群出行.
But no matter how they travel, they all take the magical journey of migration.
但无论他们如何出行,他们都走上了移民的神奇旅程.