除非 chúfēi A. conjunction only if ▸ 除非医生允许,否则病人不可下床走动。 The patient is only allowed to get out of bed once the doctor has given permission. ▸ 要想人不知,除非己莫为。 Better not do it if you don’t want others to know. B. preposition except ▸ 那台机床除非他没人会开。 No one can operate that machine tool but him. |