troy weight

troy-weight的词性：
n.（名词）

1. A system of units of weight in which the grain is the same as in the avoirdupois system and the pound contains 12 ounces, 240 pennyweights, or 5,760 grains.
金衡：重量单位系统，各与常衡中的一致，一镑等于12盎司、240英钱或5,760喱