“Alan”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	Alan
释义	请查阅Alan--Schneider
随便看	principal deformation principal dimension principal direction principal direction principal direction principal distance error principal distance of camera principal distance of photo principal distance of photo principal distance of projector principale principal earthquake principal edition principal edition principal elongation principal epipolar line principal epipolar plane principal establishment principal extension ratio principal factor analysis principal factor analysis principal factor analysis principal felling principal financial indicator principal focal distance