单词	爭先後
释义	同CONTEND
随便看	input/output sense input/output sequence input/output signal input-output signal model input/output simultaneity input/output skip input/output space input-output stability input/output standard interface input/output statement input-output-state relation input/output station input/output status input-output storage input/output storage input/output stream input/output structure input/output subsystem input/output supervisor input/output switch input-output switching input/output switching input/output switching channel input/output symbol input/output system bus