serve as an eye-opener for sb; widen (/broaden) one’s horizon; feed one’s sight on ❍ 剖析这份材料可以使人们～，进一步认识他们的丑恶嘴脸。An analysis of this material serves as an eye-opener for us to see more clearly their ugly features.
大开眼界da kai yan jie
open one’s eyes
大开眼界
open one’s eyes;broaden one’s horizon;be an eye-opener
大开眼界dà kāi yǎn jiè
指开阔视野，增长见识。greatly to widen one’s horizon, feed one’s sight on, broad one’s horizon