“after-sales and maintenance services”的概念、定义、翻译、参考文献-科学参考

单词	after-sales and maintenance services
释义	after-sales and maintenance services Encyclopedia 理学生产性服务释 after-sales and maintenance services售后与维修服务在商品出售以后所提供的各种服务活动和维修活动。
随便看	saponin saponite sapovirus sappan wood Sapper National Park sapphire sapphire substrate Sappho Sapporo Sapporo Beer Museum sap pressure saprobia saprobic system saprofication saprolegniasis sapropel-humic type kerogen Sapropel-type kerogen saprophage saprophyte saprophytic bacteria saprophytic fungi saprophytic plant saprophytism saprotroph saprotrophy

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。