“clearance of span”概念、定义、翻译-科学时代

单词	clearance of span
释义	市政工程词汇手册 clearance of span 桥下净空，桥跨净空
随便看	promotion promotion promotion promotion promotion promotion promotion promotion promotion promotion promotion promotion promotion promotional activity promotional activity promotional activity promotional allowance promotional allowance promotional allowance promotional allowance promotional appeal promotional book promotional budget promotional budget promotional campaign

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。

clearance of span