精选优质文档-倾情为你奉上一、定语从句1.In this way, we have learned all (that we know of the laws of astronomy, or of the habits of the social insects), let us say. or是并列连词;of=about比如，我们所有关于天文学规律和群居昆虫生活习性的知识，都是通过这种方式获得的。例如，通过这样的方式，我们已经掌握了在天文学规律或者是群居昆虫的习性两方面我们所了解到的一切（主与从合译）。例如，用这种方法，我们完全掌握了天文学的规律和昆虫群居的习性。2.Im usually fairly skeptical about any research that concludes (that people are either happier or unhappier or more or less certain of themselves than they were 50 y
