before operation英语标准发音:before operation英式发音:美式发音:翻译中文手术前before operation - 基本释义[词典1]手术前before operation - WEB词典before operation季前check before the operation术前检查Inspection before Trial Operation试运行前的检查 参考资料: 1.百度翻译:before operation2.有道词典:before operation3.爱词霸:before operation