Indeed, indexes created over compressed tables are themselves compressed by default.

实际上，在默认情况下，在压缩的表上创建的索引本身也是压缩的。

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Such ice cores trap gases, bits of dust, and other chemicals that were present in the snow that fell over Greenland for thousands of years and then became compressed into ice.

这些冰芯将气体、尘埃和其他化学物质封存在格陵兰岛数千年来的积雪中，然后被压缩成冰。

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Aside from compression artifacts, the cable version has other problems too, like cropping and over compressed audio -- both of which are enough to make us yearn for DVD.

ENGADGET: Sizing up Apple TV (take 2)'s HD HD

Obviously we're not the only ones not buying these overpriced, over-compressed videos, and for good reason.

ENGADGET: Amazon & iTunes drop digital download prices. Still cost too much

The hydraulic compression of the waves compressed me over a period of three seconds until I heard three bones fracturing in my shoulders.

FORBES: Larry Ellison