分贝是声音的标准单位，正常谈话的声音大约在60分贝左右。
A decibel is a standard unit of sound, and normal conversation is around 60 decibels.
电视机和收音机加起来90或J 00分贝，某单位用来测量声音的响度。
TV sets and radios add up to 90 or J00 decibels, a certain unit used to measure the loudness of sound.
分贝是用来测定声音大小的单位。
The decibel is the unit used to measure the loudness of sound.
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