Two ways of research are usually employed on the social power sources in the academic history: judgementof values and that of facts, each with its own reasons.
学术史上对社会权力来源的研究基本上通过两条路径展开：即价值判断的路径和事实判断的路径。
2
Combustion and slagging property judgementof the coal is essence for boiler design in the power plant.
判断煤质燃烧、燃烬和潜在结渣特性是燃煤电厂锅炉的设计基础。
3
The judgement and selection of conductors' section is an important aspect of power transmission line design.