[問題]OG48-26

[yutsang_0611]

In essence,
textbooks stereotype(刻板印象) and deprecate(輕視) the numerous Native
American cultures while (textbook) reinforcing the attitude that the
(10) European conquest of the New World denotes(=indicate) the superi-
ority of European cultures.

請問一下Line9的while是Although的意思還是when的意思
我常常看到while就不知它確切的意思？