It is not known how rare this resemblance is , or whether it is most often seen in inclusions of silicates such as garnet,whose crystallography is generally somewhat similar to that of diamond;but when present,the resemblance is regarded as compelling evidence that the diamonds and inclusions are truly cogenetic. 作业要求: 原句抄写+划分句子成分+翻译+拍照上传
解析:主架构简单,可是主语和表语从句都不让人省心。句子的主干其实就是:A long-held view has been that…。但是主语 A long-held view 之后却是修饰它的一个三层的定语:of the history of theEnglish colonies that became the United States。系动词 has been 之后所接的表语从句其实不止一个,其实原句是用了 and 来连接两个并列的表语从句,has been that…and has been that…。后面的 has been 照例被省略。