Rapidly changing refraction due to turbulence along the line of sight affects different colors of light by different amounts and generally produces a twinkling effect for stars.

由于湍流而快速变化的折射在视线中会影响到光的不同颜色，这种影响也各不相同，一般会给恒星产生一种闪烁的效果。

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If you live north of a line between Atlanta and Los Angeles, the winter sun is probably too weak to give you the dose of light you require, so you'll need supplements.

如果你居住在亚特兰大-洛杉矶连线以北的地区，冬天太阳过弱不足以提供所需的阳光，所以你需要补充营养。

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If this is not the case the black weight will look optically too small when it's combined with the light weight in a line of text.

否则，当粗黑体和细线体在同一行中连排时，粗黑体看上去就要比细线体要小得多。

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He said he could see the flash of light from Confederate guns along a line a kilometer long.

VOA: special.2009.12.17

More modern versions of the tool add in a laser beam projector, which allows builders to level out the device and "draw" a long line of light across a wall, indicating an exactly level surface.

FORBES: No. 18 The Level

To counter this, Intel may be betting on ultrabooks, a line of notebooks that are light, slim and elegant.

FORBES: Intel Turns To Ultrabooks As Tablet Defense

An outdoor floodlight spilled onto the road in a narrow swath, most of the light getting trapped in the yard by a line of tall maples.

NEWYORKER: The Yellow