broaden one\\'s mind,onemind

is certainty an illusion? i change my mind like all the time.
personality development: are you digging pit for someone?
into a smile 绽开了笑容 broaden one's mind broaden one's
t-cbda 中国建筑装 t-zjx 中国建设劳动 t-cecs 土木工程协项 目 管
开拓心智broadenyourmind1968–1969仅存片段