罗伯逊说：“当你把消费者置于担心和不便的境地时，那么这就是采取行动的关键时刻了。”
Robertson says, "When you get the consumer into a position of worry and inconvenience, that's where the rubber hits the road."
即使像香料这样的高价商品，也必须大量运输，以证明环绕非洲大陆航行到印度和中国的费用和不便是合理的。
Even high-priced commodities like spices had to be transported in large bulk in order to justify the expense and trouble of sailing around the African continent all the way to India and China.
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