ounce盎司; gram克; pound磅; ton吨; teaspoon茶匙; cup杯; millimeter毫米; centimeter厘米; meter米; kilometer公里; yard码; mile英里; inch英寸; square meter平方米; square foot平方英尺; cubic meter立方米; militer毫升; liter升; gallon加仑; carat克拉; horse power马力
