正外部性

positive influence, effect that people's doings or behavior have on others (society)

first month of the lunar year

straight / upright / proper / main / principal / to correct / to rectify / exactly / just (at that time) / right (in that place) / (math.) positive

outside / in addition / foreign / external

external part / external

ministry / department / section / part / division / troops / board / classifier for works of literature, films, machines etc

nature / character / property / quality / attribute / sexuality / sex / gender / suffix forming adjective from verb / suffix forming noun from adjective, corresponding to -ness or -ity / essence / CL:個|个[ge4]