Bille and his team work with an optical instrument called an active mirror—a device used in astronomical telescopes to spot newly emerging stars and far distant galaxies.

比尔和他的团队使用一种被称为“活动镜”的光学仪器，这是一种在天文望远镜的种类中用来发现新出现的恒星和遥远星系的仪器。

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Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had been made, he quickly built his own device from an organ pipe and spectacle lenses.

伽利略并没有发明望远镜，但在1609年听到有人制造了这种光学仪器后，他很快用管风琴管和眼镜镜片制造了自己的望远镜。

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In optical astronomy, using a telescope and observing the stars that way, we rely on visible light waves.

在光学天文学中，在用望远镜观察恒星时，我们依靠的是可见光波。

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Stereo line-in and out ports, plus optical in and outs, should allow you to connect this PC with your stereo system and other stereo components.

FORBES: Magazine Article

They are the first planets discovered by the enormous Keck telescope in Hawaii, the sharpest optical telescope in the world.

CNN: Astronomers spy new neighbors outside solar system

Another impressive feature is the unit's reported ability to play back DVDs via the built-in optical drive (while in park, obviously), or you can hookup the forthcoming Wii or PlayStation 3 to the dual video inputs fpr keeping you and your co-riders entertained should you hit a traffic jam (or LA stoplight).

ENGADGET: Chrysler to offer hard drive-base MyGIG head unit