shì rén / cháng / yǐ / hóng máo Tài Shān / lái / bǐ yù / jià zhí / de / tiān rǎng zhī bié

世人常以鸿毛泰山来比喻价值的天壤之别。

People often use the feather and Mount Tai as a metaphor for a world of difference in value.