Headphones are helpful. We use them to listen to music without disturbing others. Many kids use them in school. ____1____ They can cause hearing loss if the volume is too loud. Studies show that one out of every 10 kids in the United States has some hearing loss. The cause is loud noise.
耳机很有用。我们用它们来听音乐而不打扰别人。许多孩子在学校里使用它们。____1____如果音量太大，会导致听力受损。研究表明，美国每10个孩子中就有一个有听力损失。原因是噪音太大。
____2____ They can only be seen with a microscope. “We call them hair cells,” Jackie Clark said. “They look like hairs standing up.” Clark is a professor at the University of Texas at Dallas. She studies how loud noises affect our ears.
____2____它们只能用显微镜才能看到。“我们称它们为毛细胞，”杰基·克拉克说。“它们看起来像竖起来的毛发。”克拉克是德克萨斯大学达拉斯分校的一名教授。她研究噪音如何影响我们的耳朵。
Sound is invisible. But it moves in waves. It makes the hair cells move back and forth. Think of the wind in the leaves. Loud noises can damage these cells.The cells scrape (刮蹭) against the ear. This gets them twisted and bent. ____3____
声音是看不见的。但它以波浪的形式移动。它使毛细胞前后移动。想想风吹在树叶上。巨大的噪音会损害这些细胞。细胞刮蹭着耳朵。这会使它们扭曲和弯曲。____ 3 ____
One sign of hearing loss is tinnitus. ____4____ “It’s like someone is playing a note on the flute for a long time,” Clark says. “There’s no getting rid of it.” And the damage affects more than your ears. It can cause anxiety and stress.
耳鸣是听力受损的一个征兆。____4____“这就像有人在笛子上吹一个音符很长时间，”克拉克说。“没有办法摆脱它。” 这种损伤影响的不仅仅是你的耳朵。它会导致焦虑和压力。
____5____ Keep the volume on your headphones low. You should be able to hear sounds around you. And other people shouldn’t hear noise from your headphones. “If I can hear what you’re listening to when you’re wearing your headset,” Clark says, “it’s too loud.”
____ 5 ____ 把耳机的音量调低。你应该能听到周围的声音。其他人也不应该听到你耳机里的噪音。克拉克说:“如果你戴着耳机，我能听到你在听什么，那就说明声音太大了。”
A. It’s a ringing in the ears.
A.这是耳朵里的一种响声。
B. What about your headphones?
B.你的耳机如何呢？
C. How can you protect your ears?
C.如何保护你的耳朵？
D. But headphones can be harmful, too.
D.但是耳机也可能是有害的。
E. Sounds are measured in units called decibels.
E.声音的测量单位称为分贝。
F. There are cells inside the ear that help you hear.
F.耳朵里有帮助你听到的细胞。
G. And once the cells are damaged, they don’t grow back.
G.一旦细胞受损，它们就不会再长出来。
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