笔者从社会语言学角度探讨了社会与语言之间的“共变”关系。

This paper discusses the relations of "co-variation" between society and language from sociolinguistics.

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在发现铅是导致电镀锌钢板黑变发生的关键因素的基础上，对电镀锌钢板的黑变机理提出了锌铅共沉积假说和硫酸铅胶体膜假说；

On the basis of finding that lead is the vital factor to bring patina on galvanized steel sheets, two hypothesizes, colloid film of lead sulfate and the codeposition of zinc and lead, were employed.

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本文讨论了对称张量场共形协变方程的真空解。

Vacuum solutions of conformally covariant equation for symmetric tensor field are discussed.

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.. The more they covary--they move together-- the less they cancel out.

共变的趋向越大。。。它们一同增减-,风险越不会抵消。

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