If scientists know what temperature and moisture level make the tree happy, they can use the thickness to gauge what the climate was like that year.

如果科学家弄清楚什么样的温度和湿度最适合树木生长，他们就可以推算出那一年的气候情况。

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Absolute AGC is important for both control of gauge in same. plate and control of tolerance hand of aim thickness.

绝对值A GC 在控制同板差的同时，对目标厚度及其公差带的控制也至关重要；

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Abstract: The feeler gauge is a flaky guage for testing gap, thickness is the main specification.

摘要： 塞尺是一种常用的检验间隙的薄片式量具， 厚度是其主要技术指标。

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Satellites have long been used to track ice extent (area), but calculating the thickness of the marine floes requires the overflying spacecraft to gauge the difference between the top of the ice surface and the top of the water - a relatively simple calculation then gives the overall volume.

BBC: Launch success for Esa's Cryosat-2 ice mission