New forms of thought as well as new subjects for thought must arise in the future as they have in the past, giving rise to new standards of elegance.

　　参考答案:

　　要点：这是个主从复合句。as they have(arisen)in the past是状语从句，as 的意思是如同。giving...elegance是一个现在分词短语，做主句谓语的伴随状语。give rise to 的意思是引起，使发生。翻译时首先应把as they have in the past分出来译成一个分句放在句首，然后采用逆序法翻译句子的主语和谓语，最后翻译现在分词短语。

　　译文：同过去一样，将来必然会出现新的思维对象和新的思维方式，从而给完美以新的标准。