A unit of weight in the U.S. Customary System equal to! /16 of an ounce or27.34 grains(1.77 grams).是什么意思_A unit of weight in the U.S. Customary System equal to! /16 of an ounce or27.34 grains(1.77 grams).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句