Which trade spread across Canada making it important to the economy for over 300 years?

哪一种行业遍及加拿大，且超过三百年在经济上扮演重要角色？

youdao

Those devout traders, called "Wali Ullah" or "those close to God", energetically spread both trade and religion by adapting their appeals tothe native mysticism of Java.

这些虔诚的商人，叫做“Wali Ullah”，或者“接近主的人”，把他们的祈求呼吁跟爪哇当地的神秘主义相结合，通过这一途径积极热情地拓展商业买卖和宗教信仰。

youdao

Those devout traders, called "Wali Ullah" or "those close to God", energetically spread both trade and religion by adapting their appeals to the native mysticism of Java.

这些虔诚的商人，叫做 Wali Ullah，或者“接近主的人”，把他们的祈求呼吁跟爪哇当地的神秘主义相结合，通过这一途径积极热情地拓展商业买卖和宗教信仰。

youdao

The destructive carp could spread within the Great Lakes and threaten fishing and trade.

VOA: special.2009.12.15

Trade exchanges spread ceramics all over the world.

VOA: special.2009.09.09

In order to have a corresponding ounce-to-ounce spread trade in the futures market, a trader who is looking for the spread to narrow would buy two 50-ounce platinum futures contracts and simultaneously sell one 100-ounce gold futures contract.

FORBES: FOCUS: Platinum-Gold Spread Narrows, But Gold Remains At Premium

Thus, one analyst suggests anybody wanting to take a longer-term spread trade in favor of platinum might consider tip-toeing into a position rather than racing full speed ahead.

FORBES: Platinum/Gold Spread Offers Trading Opportunity, But Timing Could Be Difficult

The marketmakers rarely allowed customers to trade inside the spread, even if one customer was willing to pay the same price that another customer wanted to sell his stock for.

FORBES: Guerrillas on Wall Street