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
