恩人: a benefactor, a person who has significantly helped sb else...
男人: a man, a male, men...
当地: local...
宪法: constitution (of a country)...
一技之长: proficiency in a particular field (idiom), skill in a specialized area (idiom)...
流失: (of soil etc) to wash away, to be eroded, (of talented staff, followers of a religious faith, investment funds etc) to go elsewhere, to fail to be retained...
首先: first (of all), in the first place...
替代: to substitute for, to replace, to supersede...
严谨: rigorous, strict, careful, cautious, compact, well-knit...
经久不息: prolonged, lasting...
