“交替”概念、定义、翻译-科学时代

单词	交替
释义	语言学词汇手册 alternation 交替
随便看	screw pump screw reactor screw rolling screw rolling mill screw-rudder screwshaft screw stairs screw thread screw thread screw thread screw thread gauge screw thread micrometer screw-tree screw-type bulb screw-type fuse screw type pump scribble scribble scribbler scribe scribe scribe scribe scriber scriber

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。

alternation