“垫环”概念、定义、翻译-科学时代

单词	垫环
释义	环境科学与工程词汇手册垫环 backing ring
随便看	tariff protection tariff questions tariff quota tariff quota tariff quotas tariff rate tariff rate tariff rate tariff rate tariff rate tariff rate of protection tariff-rate quota Tariff Reform League tariff regulation tariff schedule tariff schedule tariff schedule tariff schedule tariff structure tariff suspension tariff treaty tariff union tariff wall tariff wall tariff wall

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。