by which

by which

"The Muslim religion, modified by its Turkish and Afghan race-bearers, was further modified by the Persian culture by which all the invaders were more or less influenced."

このby whichの意味がわかりません。。。
できればこの英文の日本語訳もお願いします＞＜

No.1 ベストアンサー 回答者： jurious 回答日時： 2010/02/28 01:09

which 以降が the persian culture　に掛ることはおわかりと思いますが、

all the invaders were more or less influenced by the Persian culture
と考えてください。
　influenced by ～　の　by　を前に出したのです。