No air bubbles were present in the green ice, suggesting that the ice was not formed from the compression of snow but instead from the freezing of seawater.

绿色冰层中不含气泡，这表明了这种冰层是由冻结的海水形成的，而不是凝结压紧的积雪。

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The extended directory catalog offers no compression of entries, which results in the extended directory catalog being much larger in size than the mobile directory catalog.

扩展式目录编目提供了未经压缩的条目，因此该目录编目比便携式目录编目大得多。

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Compression usually lasts no more than 20 to 30 seconds.

压缩通常持续不到20至30秒。

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So when I see a compression on a wild swinging stock I consider it a no-brainer trade to simple watch and wait for the big move to begin.

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And you only have to look under the hood or crawl beneath the car to see a technological nightmare: A low-compression flathead V-8, cloth wrapped wires, a crude carburetor, leaf springs and no shocks, big mechanical brakes that were about as useful as an anchor, and a differential the size of a melon, to appreciate that this car was a polluting, rattling, death trap.

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