“双元音”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	双元音
释义	出版印刷词汇手册双元音 diphthong
随便看	symmetrical cable symmetrical circulation symmetrical compound symmetrical confocal geometry symmetrical coordinate symmetrical cross-cousin marriage symmetrical cross-cousin marriage symmetrical cutting symmetrical distribution symmetrical distribution symmetrical eyepiece symmetrical factorial design symmetrical family symmetrical flower symmetrical fold symmetrical four-pole sounding symmetrical frequency curve symmetrical lens symmetric alliance symmetrical mode symmetrical molecule symmetrical objective lens symmetrical profiling symmetrical radiator symmetrical reflector