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全國專業英語四級聽力難點提升
He who wants to do good knocks at the gate; he who loves finds the gate open.以下是小編為大家搜索整理的全國專業英語四級聽力難點提升，希望能給大家帶來幫助!更多精彩內容請及時關注我們應屆畢業生考試網!
Waves
How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way —in waves!
Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light and sound travel through different kinds of matter. For example, light waves cannot move through walls, but sound waves can. That is why you can hear people talking in another room even though you cannot see hem. The energy of some waves is destructive. An arthquake produces seismic waves.
Catch a wave. Ask a friend to stand a few feet away from you. Stretch a spring between you. Shake the spring to transfer energy to it. What happens? The spring bounces up and down in waves. When the waves reach your friend, they bounce back to you!
Light waves travel 300,000 kilometers (186, 000 miles) per second! They can also travel through a vacuum. That is why light from the sun and distant stars can travel through space to the earth! (175 words)
Useful Words and Expressions:
matter n.物質;內容;事情
reading matter閱讀材料
This is a matter of no account.這是一件無關緊要的事。
I have an urgent matter to atend to.我有一件急事要辦。
I have an important matter to talk to you about.我有件重要的事要和你談談。
destructive adj.破壞(性)的
seismic adj.[地]地震的
seismic waves震波
bounce v.(使)反跳，彈起
bounce back彈回
vacuum n.真空立
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