science moves forward,they say,not so much through the insights of great men of gennius as because of more ordinary things like improved techniques and tools.
参考答案:
要点:本句中not so much through the insights of great men of gennius as连接状语,意思是“与其说...不如说...”。they say可以放在句首,放在句首是主谓结构,放在此处是插入语,造成句子的,翻译时按主谓结构译出。