A fundamental unit of length in both the U.S. Customary System and the British Imperial System, equal to3 feet, or36 inches(0.9144 meter).是什么意思_A fundamental unit of length in both the U.S. Customary System and the British Imperial System, equal to3 feet, or36 inches(0.9144 meter).在线翻译_英语_读音_用法_例句