Warning: file_put_contents(/www/wwwroot/zidian/biehu.cn/cache/f655c959055aed0bd14f71cd4229bb42.txt): failed to open stream: No space left on device in /www/wwwroot/zidian/biehu.cn/index.php on line 58 brachistochrone英英字典_brachistochrone剑桥英语解释_brachistochrone柯林斯英文解释_甲百匯小鸡词典
1. N the curve between two points through which a body moves under the force of gravity in a shorter time than for any other curve; the path of quickest descent 最速降線[maths]