单词	向日彗尾
释义	向日彗尾sunward tail
随便看	user structure user study user submitted batch job user supplied directive user support software user survey user-survey analysis user switching cost user system behavior user system emulation user system evaluator user system evaluator--use user system evaluator，use user system interaction user system interface user system interface，usi user tag id user task user task scheduling user technical exchange user teleservice information user template user terminal user time user time-sharing