“upper reach”概念、定义、翻译-科学时代

单词	upper reach
释义	海洋与水文词汇手册 upper reach 上游河段，上游
随便看	switch switch switch switch switch switch switch arm switch-back comedy switchback design switch back road switch back road switch bench switch bill of lading switchboard switchboard switch board switch board switch board switchboard switchboard operator switch cargo switch-case statement switch deal switched circuit switched connection

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。