luminosity
英 [lu?m?'n?s?t?]
美[,l?m?'nɑs?ti]
- n. [光][天] 光度；光明；光輝
TOEFL
詞態(tài)變化
復(fù)數(shù):?luminosities;副詞:?luminously;形容詞:?luminous;
英文詞源
- luminosity (n.)
- 1630s, "quality of being luminous," from French luminosité or else a native formation from luminous + -ity. In astronomy, "intrinsic brightness of a heavenly body" (as distinguished from apparent magnitude, which diminishes with distance), attested from 1906.
雙語例句
- 1. For a few years its luminosity flared up to about 10,000 times the present-day luminosity of the Sun.
- 它的亮度有幾年一度達(dá)到了現(xiàn)在太陽亮度的一萬倍左右。
來自辭典例句
- 2. Mount Battie without losing its definition would take on a blue luminosity.
- 遠(yuǎn)處的巴蒂山沉浸在一派藍(lán)茫茫的暮藹之中,輪廓朦朧.
來自辭典例句
- 3. Astronomers tacitly assume that stars of the same luminosity and color all have the same mass.
- 天文學(xué)家心照不宣地默認(rèn),光度和顏色都相同的恒星具有相同的質(zhì)量.
來自辭典例句
- 4. The cloud should then have an infrared luminosity thousands of times the sun's bolometric luminosity.
- 云的紅外光度應(yīng)為太陽熱光度的幾千倍.
來自辭典例句
- 5. The quasars cannot shine for longer than a few million years with their present luminosity.
- 在幾百萬年以后,類星體將不可能具有他們今天那樣的發(fā)光度.
來自辭典例句