Johnston指出，Twitter对于捷蓝航空的主要作用在于测定品牌认知以及聆听客户声音。
Johnston said Twitter's primary function for the airline is to gauge brand perception and to listen to what customers are saying.
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.
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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