“简单完成时”概念、定义、翻译-科学时代

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。

单词	简单完成时
释义	语言学词汇手册 simple perfect 简单完成时
随便看	single judge single junction single junction bleeder single junction for air relief with bell and spigot single key response single knit fabric single knot single large expensive disk single large expensive disk--single large expensive disk (SLED) single large expensive disk (SLED) single-layer single-layer coating (SC) single layered polyhead single layer structure single leaf singleleaf pinyon single lens single lens reflex single-lens reflex camera single lens reflex--single lens reflex (SLR) single lens reflex (SLR) single lesson single level line single-level marketing single liability principle

simple perfect