鹽酸甲烯土霉素opting out: 拒絕接受特別提款權(quán)分配額的權(quán)力optimus鍵盤: optimus keyboard; optimus maximus keyboardopting out of a conventional lifestyle: 逃離傳統(tǒng)生活方式optimus prime (robots in disguise): 擎天柱 (變形金剛)optinomics: 最佳經(jīng)濟學下載手機詞典可隨時隨地查詞查翻譯