Troy

/trɔɪ/ 21

a system of weights used for precious metals and gemstones, based on the grain, which is identical to the avoirdupois grain.^金衡制

Troy finally fell to the Greeks.
特洛伊城最终被希腊人攻陷。

24 grains = 1 pennyweight; 20 pennyweights = 1 (troy) ounce; 12 ounces = 1 (troy) pound

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