diameter
n
(length of a) straight line connecting the centre of a circle or sphere, or of the base of a cylinder, to two points on its sides 直径
the diameter of a tree-trunk 树干的直径
a lens that magnifies 20 diameters, ie makes an object look 20 times longer, wider, etc than it is 放大20倍的透镜. =>App 5 见附录5. =>illus at circle 见circle之插图.
Marsabbr. master attitude reference system 主要态度参考系统;midair retrieval system 中空恢复系统;military affiliated radio system 军用附属无线电系统;mathematics anxiety rating scale 数学焦虑等级刻度;
n. 毁坏,损坏,玷污( mar的名词复数 );
v. 毁坏,损坏,玷污( mar的第三人称单数 );