serve as an eye-opener for sb; widen (/broaden) one’s horizon; feed one’s sight on ? 剖析這份材料可以使人們～，進(jìn)一步認(rèn)識他們的丑惡嘴臉。An analysis of this material serves as an eye-opener for us to see more clearly their ugly features.
大開眼界da kai yan jie
open one’s eyes
大開眼界
open one’s eyes;broaden one’s horizon;be an eye-opener
大開眼界dà kāi yǎn jiè
指開闊視野，增長見識。greatly to widen one’s horizon, feed one’s sight on, broad one’s horizon