“civil twilight”的概念、定义、翻译、参考文献-科学参考

单词	civil twilight
释义	civil twilight [¦si·vǝl ¦twī´līt] ^ASTRONOMY The interval of incomplete darkness between sunrise (or sunset) and the time when the center of the sun's disk is 6° below the horizon.
随便看	composite filter composite flash composite fold composite fuel composite function composite gene composite gneiss composite grain composite group composite hypothesis composite I-beam bridge composite joint composite macromechanics composite map composite material composite micromechanics composite nerve composite number composite photograph composite picture signal composite pile composite plate composite profile composite propellant composite pulse

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。