Foot–pound–second system
The foot–pound–second system or FPS system is a system of units built on the three fundamental units foot for length, (avoirdupois) pound for either mass or force (see below) and second for time.
网站首页 情感咨询 情感美文 情感百科 情感生活 学习充电 旧版美文
依恋情感网英汉例句词典收录3870147条英语例句词条，基本涵盖了全部常用英语单词的释义及例句，是英语学习的有利工具。