diametrical
adj. 直径的；正好相反的；截然的
例句
He's the diametrical opposite of his brother.
他和他的弟弟截然不同。
《牛津词典》
A disk turning on a diametrical axis inside a pipe, used as a throttle valve or damper.
节流阀，减压阀：管道内沿直径中心轴线上的圆片状旋钮，用作节流阀门或阀门。
Chang's first view on WWI is in diametrical opposition to his fourth view on WWI, not to say the fifth one.
张君劢对欧战的第一个看法和第四（第五）个看法简直是南辕北辙，完全相反。
