“optional port”概念、定义、翻译-科学时代

单词	optional port
释义	国际贸易词汇手册 optional port 选择港，任意港
随便看	spring cutting spring cymbidium spring-diaphragm regulator spring-disk valve spring-element spring enrollment Spring Equinox Spring Equinox spring equinox springer springer springer springer springeric spring-fed intermittent stream spring-fed lake spring-fed stream spring feeder spring felling Spring Festival Spring Festival Spring Festival picture spring fishing season spring flood spring flood forecast

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。

optional port