介绍:
Day30
1信息廉价时，对信息的关注就变得昂贵。
When information is cheap,attention becomes expensive.
2我从没听过更好听的嗓音。
I have never heard a better voice.
3你能听到流水声和鸟鸣声吗？
Can you hear the sound of running water and the voice of the bird?
4他班所有学生中他做的最差。
He did worst among the students in his class.
要点：
①a better voice比较级可表达最高级含义
②sound“声音，响声”，泛指自然界能听到的一切声音；voice多指人的嗓音或鸟鸣、虫叫
③among表示三者或三者以上之间，应用最高级
