“principal directions”的概念、定义、翻译、参考文献-科学参考

单词	principal directions
释义	principal directions [`prin·sǝ·pǝl di`rek·shǝnz] ^MATHEMATICS For a point on a surface, the directions in which the normal curvature attains its absolute maximum and absolute minimum values.
随便看	sandal oil sandalwood sandalwood oil sand apron sandarac sandarac gum sand auger sand avalanche sandbag sandbank sandbar sandblasting sandblow sand boil sand-cast sand cay sand cone sand control sand count sand crystal sand devil sand dike sand dollar sand drain sand drift

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。