Optical microcavity arouses great interest in condensed state physics. It can change characters of spontaneous emission, such as spectral full width at half-maximum, light intensity at peak and so on.

光学微腔是目前凝聚态物理的研究热点，它能够改变自发发射的特性（谱线宽度、发光强度等）。

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It 's a very light sponge cake soaked in a mixture of condensed milk, evaporated milk and regular milk - the three milks that give it its name - then coated in lashings of whipped cream.

将柔软的海绵蛋糕泡在炼乳，淡奶和全脂牛奶中-这三种牛奶就是它名字的来源-然后在外面涂上鲜奶油。

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But as the first stars condensed out of the newly formed atoms, the heat and light they produced would have started to tickle the hydrogen clouds around them into emitting radio signals at a characteristic wavelength of 21cm.

ECONOMIST: Radio telescopes