盐酸甲烯土霉素opting out: 拒绝接受特别提款权分配额的权力optimus键盘: optimus keyboard; optimus maximus keyboardopting out of a conventional lifestyle: 逃离传统生活方式optimus prime (robots in disguise): 擎天柱 (变形金刚)optinomics: 最佳经济学下载手机词典可随时随地查词查翻译