spectrum n. (pl. -tra ) 1.【物理學(xué)】譜,光譜;波譜;能譜,質(zhì)譜。 2.【無線電】射頻頻譜;無線電(信號)頻譜。 3.【心理學(xué)】(眼睛的)余像;殘像。 4.〔轉(zhuǎn)義〕范圍,幅度;(連續(xù)的)系列。 an absorption spectrum 吸收(光)譜。 a bright line spectrum 線狀光譜。 an optical spectrum 光譜。 a solar spectrum 太陽光譜。 a wide spectrum of opinion 意見的不同幅度甚大。
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例句與用法
Except where there are physical constraints such as spectrum scarcity, we allow market force to decide on the number of licences to be issued for different types of telecommunications services 除非基于頻譜不足等實(shí)際條件所限,我們是任由市場去決定各類電訊服務(wù)的牌照數(shù)量。