avoirdupois

In the United States, many food products are sold by avoirdupois, with weights in pounds and ounces.

在美国，许多食品按常衡制出售，以磅和盎司为单位计量。

The label shows the net weight in avoirdupois, so you can compare it with the metric figure.

标签上标明了常衡制的净重，方便你与公制数值进行比较。

In her first nutrition class, the students learned how to convert avoirdupois to grams.

在第一堂营养课上，学生们学习了如何把常衡制换算成克。