Billy: And lightweight, too. It'll play for 20 hours on two AA batteries!

Jennifer: Cool! The sound is great. These earphones are awesome!

Billy: And they're really safe. They'll protect your ear from sound damage.

Jennifer: You certainly need that. You always pump the volume up way too high.

Billy: I know. And you can also hear outside noises while you listen to music.

Jennifer: You're right! So I can listen to music while riding my motorbike!

★ lightweight (a.) 轻量的

★ battery (n.) 电池

★ awesome (a.) 极好的，很棒的

★ pump up指将音量开得很大

★ way too high 太过量了。在这个句子中，way这个字当副词用，是very(非常)的意思

★ motorbike (n.) 摩托车

比 利:而且MP3也很轻呢。它用两个AA电池，就可以播放二十小时的音乐!

珍妮花:酷!声音好棒。这耳机真不赖!

比 利:它们也很安全，可以保护耳朵避免声音过大而受损。

珍妮花:你的确需要它。你总是把音量开得太大。

比 利:我知道。而且听音乐的同时，你依然能听到外界的声响。

珍妮花:你说得对!这下我可以在骑摩托车的时候听音乐了!