luminosity相关的词根或词缀是: luclust lumin lustr

复数： luminosities

Specifically , luminosity is proportional to radius squared .

具体来说，光度与半径的平方呈正比。

Specifically , the luminosity of a star is proportional to temperature to the fourth power .

具体来说，恒星的光度与温度的四次方呈正比。

In principle , one can trace that history back in cosmic time by observing a so-called standard candle , a class of astronomical object whose intrinsic luminosity is uniform .

原理上，我们可以通过观测所谓的标准烛光（一种天体，它的绝对光度是相同的）来追溯宇宙内的历史。

And if octopuses , cuttlefish and squid-and some of their predators and prey-can see polarized light so keenly , are they also using it , as they use color and luminosity , to actively create camouflage ?

而且如果章鱼，墨鱼，还有鱿鱼，以及一些他们的掠食者及被捕食者能够敏感地看到偏振光，他们是否也像利用颜色和光度一样，利用这个特性来活跃地制造他们的保护色呢？