This is possible only because disk drives, while valuable, are small and light and so cost little to ship.
这之所以成为可能，只是因为磁盘驱动器虽然价值高，但体积小、重量轻，因此运输成本低。
From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120,000 light-years.
从一端到另一端，银河系布满星星的圆盘横跨12万光年，可以用肉眼和光学望远镜观察到。
This is not the star's disk you are seeing but the effect of having a circular aperture in your telescope and due to the nature of light.
这不是星星自身的光环，而是由于望远镜的圆形孔径光阑以及光的物理特性造成的。
From end to end, the Milky Way's starry disk, observable with the naked eye and through optical telescopes, spans 120, 000 light-years.
它是一个布满星星的圆盘，从一端到另一端跨越了120,000光年。你可以用肉眼，也可以通过光学望远镜观察银河系。
But during an eclipse, the source of light is blocked and the moon's disk goes unusually dark.
但在整个月食过程中，光源被挡住，月亮的盘面通常是暗的。
Broader than the disk, NGC 660's ring spans about 40, 000 light-years.
NGC 660的环比盘更为宽广，直径大约为40000光年。
English astronomer and stockbroker who discovered the beads of light phenomenon (now called BAILY'S BEADS) that occurs around the LUNAR disk during a total ECLIPSE of the SUN.
英国天文学家和股票经纪人，他发现了日全食时围绕月盘的光珠现象（现在被称作“卑栗珠”）。
A night vision device amplifies this light to visible levels. The light, which is made up of photons, is converted into electrical energy and then accelerated through a thin disk.
夜视仪将这种光增强到可视的程度，并把这种由光子构成的光转变为电子能量，然后通过一种很薄的磁盘增加电子能量的强度。
When conditions are just right, shorter wavelengths such as green are bent more than longer wavelengths such as orange, and a flash of green light appears near the top of the solar disk.
当条件正好合适的时候，比起波长较长的橙色，像绿色这样波长较短的颜色会发生更多的折射，这时太阳圆盘顶端附近就会出现绿色闪光。
RACO's spring loaded brake actuators are designed for electric powered vehicles such as light rail street cars, trams, cable cars, with drum or disk brakes.
RACO的弹簧式制动调节器设计用于电动车辆，比如有轨电车，矿车，缆车和卷筒或盘式制动器。
The author suggested that the fixed vault light oil tanks would be provided with the similar disk.
文章提出在固定顶轻油罐中加装类似的浮盖的意见。
With light wave diffraction theory, the mathematical model of optical field at the recording layer is developed for magneto-optical disk.
运用光波衍射理论，针对磁光盘建立了记录光场的数学模型。
With light wave diffraction theory, the mathematical model of optical field at the recording layer is developed for magneto-optical disk.
运用光波衍射理论，针对磁光盘建立了记录光场的数学模型。
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