捷进英语ppt课件

What's the reason for animal migration?
奇妙的旅途
几乎所有的动物迁徙都只是 出于同一个理由——生存。 有些动物迁移是为了寻找食 物，另一些则是为了远离危 险，繁衍后代。动物们没有 一个挂在墙上的日历告诉他 们何时迁徙，那么它们是如 何知道何时该启程了呢？它 们又是如何找回到多年前出 生的地方呢？又或者，它们 是如何知道在这12,000 英里 的旅途中该向哪个方向前行 呢？科学家正开始了解更多 关于动物迁徙的奥秘。
find one’s way (back) to
Proper Names
How much do you know about animal migration? Watch the following video clip, and think about the following questions. 1. What animals are mentioned in the video? 2. What animal makes the longest migration?
√ 1 How animals migrate. √ 2 Why animals migrate. √ 3 Our understanding of animal migration.
4 The biggest migration of animals. 5 How humans travel around.
How could animals judge when to migrate?
很多事物可以告诉动物何时迁徙：有些依据白天的长短，有些靠外界 的温度变化判断时间，而另一些则通过他们体内脂肪的水平决定启程 的时间。动物们知道自己需要多少脂肪。当脂肪水平减少时，很多动 物就会出发。但是，如果它们等待的时间过长，就会没有足够的脂肪 来完成旅行。
How could animals find their way to their destination?
# migration survival calendar # migrate direction
temperature whereas fat destination landmark
# turtle # salmon # crab
giant # magnet
Phrases and Expressions
READING FOR LEARNING
Amazing Journeys
Task 1 Task 2 Task 3 Task 4
READING FOR LEARNING
Βιβλιοθήκη Baidu
Task 1
Read the first paragraph and tick the things you think the text will cover. Read the text and check your predictions.
Journeys of Discovery
1
WARM-UP
2
READING FOR LEARNING
3
READING FOR DOING
4
GUIDED WRITING
5 AUDIO/VIDEO LAB
6
WRAP-UP
READING FOR LEARNING
Text: Amazing Journeys Vocabulary Focus Grammar Focus Beyond the Text
Amazing Journeys
译
A
文
Nearly all animal migrations happen for one reason only—survival. For some animals, it is to find food. However, for others, it is to have their young in a place away from other dangerous animals. Animals do not have a calendar on their wall to tell them when to migrate. So how do they know when to leave? How do they find their way back to the place they were born many years ago? Or how do they know which direction to go on a 12,000-mile journey? Scientists are starting to understand more of the secrets of animal migration.
译 文
B
Knowing when to migrate comes from various things. For some animals, it is how long the day is. Some judge the time by the temperature outside, whereas others know when to travel by the level of fat in their body. Animals know how much fat they need. When their fat levels fall, many will migrate.However, if they wait too long, they will not have enough fat to make the journey.
Using the introduction paragraph (有效利用开头 段落)
文章的开头段落一般具有 文章概览的特点，它是对 文章内容的整体介绍，通 常包含背景知识、相关统 计数据、作者的主要观点 等。所以，在写论文或查 阅资料时，我们通常可以 通过快速浏览文章的开头 段落来决定是否继续阅读 或购买这篇资料。