若随机变量X, Y相互独立，且D(X)=25，D(Y)=16，则D(X+Y)=_____，D(X-Y)=_____

A. 逗号前后两个分句考查因果连接，前句是结果，后句是原因，可用as进行连接,也可以处理为定语从句，还可以处理为and 连接的并列成分。
B. 前句主语是“人们”属于泛指类，采用it 作形式主语的被动翻译比较好，即：It was considered that ... ;后句“只有厨艺出众者”可以理解为“只有掌握了出众厨艺的那些人”，采用定语从句翻译，即：only those who mastered outstanding cooking skills。
C. “这份工作”是指“在皇宫做饭”即：a position，补充说明其前面真正的主语：to prepare meals in the palace，其余内容处理为省略关系词that 的定语从句，修饰a position，按照顺序翻译即可。
D. It was considered as an absolute honor / a great honor to prepare meals in the palace, as only those who mastered outstanding cooking skills were adequate for the position.或者：It was considered as an absolute honor / a great honor to prepare meals in the palace, a position only those who mastered outstanding cooking skills were adequate for.或者：People thought that cooking in the royal palace was a great honor, and only those who excelled in cooking could get this job.