We是主语,need to put aside 谓语,our often unfouned attitudes of superiority and prejudice again other cultures 宾语.
attitudes是宾语的核心词.
our often unfouned;
of superiority and prejudice again other cultures 都是用来修饰attitudes的,所以是定语.
译文:我们需要抛弃我们常有的习惯性的用傲慢与偏见对待其他文化的态度.