Tā chūshēn wēijiàn, dàn píng nǔlì huòdé le chénggōng.
He was born into a humble background, but achieved success through hard work.
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Literary/formal. Modern speech uses 卑微 or 低微 more often. 微贱 has a classical flavor and shows up in historical novels, biography, and essay-style writing.
