英语词汇optional service怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	optional service
释义	optional service operationalizevt. 使用于操作,使开始运转,实施 observationaladj. 根据观察的；监视的 improvisationaladj. 即兴的 professionalizevt. 使 ... 职业化；使 ... 专业化
随便看	give a bond for give about give ... a break give a break give a bribe to someone give a bum steer give ... a buzz give a buzz give a call give access to give account of give a chance give a charge for give a child the breast give ... a clean bill of health give a compliment to sb give a concert give ... a crack give a crap give a cry give a damn give a dance give a dare give a darn give ... a day

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