内容正文:
UNIT 5 HUMANS AND NATURE
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Tiny bits of salt.
The heat within Earth is not the same.
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谢谢观看 THANK YOU!
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1.All nature is but art,unknown to thee.
—Pope
所有的自然都是艺术,这是你所不知道的。
——波普
2.Nature is not governed except by obeying her.
—Bacon
自然不可驾驭,除非顺从她。
——培根
3.Our motto,as you know,is “Live according to Nature”.
—Seneca
如你所知,我们的格言是“遵照自然去生活”。
——塞涅卡
The intimacy between man and Nature began with the birth of man on the earth,and becomes each century more intelligent and farreaching.To Nature,therefore,we turn and regard it as the oldest and most influential teacher of our race;from one point of view,once our taskmaster,now our servant;from another point of view,our constant friend,instructor and inspirer.
Have you ever noticed that,in the summer,when your sweat dries it will leave marks on your Tshirt? The marks are tiny bits of salt.
If you go to the seaside,you will know that seawater does the same to your clothes,because it also has a lot of salt in it.
When an ocean plate bumps into a land plate,the less dense land plate floats over the ocean one.The ocean floor gets pushed under,and its salty rocks,along with shells and bones,are lost deep within Earth.
So,that's why the seas are salty but don't get any saltier.
[探究发现]
1.Find out what the marks are on your Tshirt.
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2.Find out if the heat within Earth is the same?
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