英语词汇“non-obligatory”的翻译、意思、用法、释义-英汉双解词典-注文网

单词	non-obligatory
释义	non-obligatory 非强制性的非义务性的
随便看	observational language observational learning observationally observationally equivalent observational material observational measurement observational method observational network observational point observational record observational research observational site selection observational skill observational statement observational studies observational study observational survey observational terms observational-theoretical distinction observational twilight observational unit observation and forecast of movement of groundwater and salt observation and learning activities observation and recording device observation angle (of a retroreflector) 252122245 252122434 252122453 25212251 252122534 25212312 252123411 252123421 252123434 252123454 短欠短款短气短池短波短浅短消息短片短球短盘驴