代理

to act on behalf of sb in a responsible position / to act as an agent or proxy / surrogate / (computing) proxy

to substitute / to act on behalf of others / to replace / generation / dynasty / age / period / (historical) era / (geological) eon

texture / grain (of wood) / inner essence / intrinsic order / reason / logic / truth / science / natural science (esp. physics) / to manage / to pay attention to / to run (affairs) / to handle / to put in order / to tidy up