right-anglesBNC⁵¹⁹⁵⁶ 基本例句 n.直角原型right-angle的复数 His left arm was somewhat shorter than his right; when he stood or walked, the back of his hand was at right-angles to his body, his thumb parallel to his thigh. 他的左臂比右臂稍短，站立或行走时，左手的手背与身体成直角，大拇指和大腿平行。 douban