单词	共变（量）
释义	共变（量）covariation
随便看	input/output compiler input/output complete signal input/output concept input/output condition input/output connector input/output console input-output control input/output control input/output control extensiveness input/output control header input output controller input-output controller input/output controller input-output control module input/output control module input/output control program input/output control program--iocp input/output control program，iocp input/output control structure input/output control subsystem input-output control system input/output control system input-output control system (iocs) input-output control system {=iocs} input-output control system{=iocs}