decibel GRE专八

The typical lawn mower makes about 90 decibels of noise.

典型的割草机发出的响约为90贝。

This often limits their ability to truly differentiate their ambience from that of the fashion shop next door, which booms out teenybopper music at alarmingly high decibel levels.

这就常常限制了书店将自己的氛围同隔壁的时装小店区开来的能力，而那些时装店经常用高贝的喇叭播放着流行的靡靡之音。

This paper described the basic concept and expressions of the decibel and Neper. It also explained some merits of the calculation rntes and Application ranges of the measuremeut Units.

本文阐述了贝与奈培的基本概示方法，同时还说明了该计量单位的优点、计算法则应用范围。