See the light of day字面意思看到白天的光，真实含义是重见天日；问世；为公众所知。

【例句】
Museum basements are stacked full of objects which never see the light of day.
博物馆的地下室里堆满了永远不会重见天日的物件。

You would never see the light of day again.
你这辈子恐怕无法重见天日。