high fidelity
(also hi-fi), reproduction of sound (by radios, record-players, tape-recorders, etc) that is of high quality, with little or no distortion of the original sound (收音机、 电唱机、 录音机等复制声音的)高保真度.
In their efforts to persuade us to buy this or that product, advertisers have made a close study of human nature and have classified all our little weaknesses.