他做丝绸生意。
These voyages allowed China to trade valuable goods like gold, silver and silk.
这些旅行允许中国交换一些贵重物品，如金、银和丝绸。
Silk was a valuable goods instead of currency in the international trade.
绢帛在国际贸易中不再是货币，而是重要的商品。
My father carries on a trade in silk.
我父亲经营丝绸生意。
My father carries on a trade in silk.
我父亲经营丝绸生意。
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