N a small earphone worn in the ear for use with a mobile phone (配合手机等使用的)耳塞
If you really need music as a distraction, keep the volume low and one earbud out.
如果你确实需要音乐来调节，请调低音量并只一只耳朵戴耳塞。
You, like thousands of other Americans, suffer from Earbud Cartilage Deficiency Syndrome (E.C.D.S.).
正如其他上千万的美国人一样，你患上了耳塞软骨缺损综合症(e.c.d.s)。
If you absolutely must use your iPod on the run, just use one earbud or keep the volume low so you can still hear what's going on around you.
如果你实在必须在跑步中听ipod，那就只听一边耳机或把音量调低，这样你仍然能听到周围发生了什么。
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