“heliacal year”概念、定义、翻译-科学时代

单词	heliacal year
释义	天文学词汇手册 heliacal year 偕日升年
随便看	pulse solid rocket engine pulse spacing pulse spacing pulse spacing pulse spectrometer pulse spectrum pulse spectrum pulse strength pulse stretcher pulse stretching pulse-stretching circuit pulse survey pulse system pulse telemetry parameter pulse thermal reactor pulse time modulation pulse-time modulation pulse train pulse transducer pulse transmission pulse triggering pulse-type airborne electromagnetic instrument pulse variations corresponding to seasonal changes pulse wave pulse wave

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。