This paper tells you the water content in a GIS, the quantity of arc decomposition in an arc unit and the quantity of absorbent needed for absorbing water content and arc decomposition.

介绍了GIS设备内部水分的含量、灭弧单元电弧分解物的多少，吸收水分和电弧分解物所需吸附剂量的大小。

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And one of the things that a company like ARC Energy is doing is trying to bring down the unit cost for each of those light bulbs.

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During the past 50 years oceans have become "one-third of a pH unit more acid" according to Australia's ARC Centre of Excellence for Coral Reef Studies, (CoECRS).

CNN: All About: Coral Reefs