His fidelity and industry brought him speedy promotion.
他的尽

奋
他

得到晋升。
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英语精读(第2版)第三册 Wireless fidelity. Technically, it's a standard ensuring that equipment works on a wireless network. It's on analogy with 'hi-fi', for high fidelity, that used to be common for recording some years ago.
Wifi全称为wireless fidelity.(无线保真),从专业的角度讲,是一种确保不需要线缆也可使用因特网的技术。 Wifi和hi-fi(高保真)相似--“高保真”一词多年前就出现了,是用来形容唱片音效的。
(视频版)
人(汇总)