| 释义 |
〔balance〕A weighing device, especially one consisting of a rigid beam horizontally suspended by a low-friction support at its center, with identical weighing pans hung at either end, one of which holds an unknown weight while the effective weight in the other is increased by known amounts until the beam is level and motionless.天平，秤：一种称重量的器具，特别指那种中间有一个低摩擦支撑物水平悬吊在一根坚硬横杆上的秤，两个重量完全相等的秤盘挂在两头，一头盛未知的重物，另一头放有效砝码，用已知的数量抬高，直到横杆呈水平状态并且停止运动〔equilateral〕A side exactly equal to others.等边：同其它边完全相等的一边〔equivalent〕Having virtually identical or corresponding parts.相等的：具有完全相等部分或对应部分的〔identical〕Exactly equal and alike.完全相等的或相似的 |