单词	historical era
释义	historical era = historical period
随便看	change-colour fluid culture change command argument change commitment item group fm Change Commitment Record Change Commitment Summary Change current state of session change curve change cutting Change computer simulation Change Concepts change-condition change contract change control change control authority change control board change control client change control command indicator change control domain change control procedure change control procedures change control server change control services Change Control Sub-Board change control system change copy