“crystal system”的概念、定义、习题解题方法及翻译-物理辞典

单词	crystal system
释义	crystal system A method of classifying crystalline substances on the basis of their unit cell. There are seven crystal systems. If the cell is a parallelopiped with sides a, b, and c and if α is the angle between b and c, ß the angle between a and c, and γ the angle between a and b, the systems are: (1) cubica=b=c and α=ß=γ=90° (2) tetragonala=b≠c and α=ß=γ=90° (3) rhombic (or orthorhombic) a≠b≠c and α=ß=γ=90° (4) hexagonala=b≠c and α=ß=γ=90° (5) trigonala=b≠c and α=ß=γ≠90° (6) monoclinica≠b≠c and α=γ=90°≠ß (7) triclinica=b=c and α≠ß≠γ
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物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。