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.
葡萄牙人瓦斯科·达·伽马在15世纪末环绕南非航行至印度，而到1502年的时候跨阿巴拉比的商队路线因政治动乱而被切断。
The Portuguese Vasco da Gama's Voyage around southern Africa to India took place at the end of the fifteenth century, and by 1502 the trans-Abrabian caravan route had been cut off by political unrest.
劳拉和她的支持者们已仔细制定出此次为期近两年的环球航行线路图，其中包括一条环绕非洲的备用线路，以便避开海盗出没的亚丁湾。
Laura and her supporters have carefully plotted a nearly two-year route from port to port around the world, including an alternative path around Africa to avoid the pirate-infested Gulf of Aden.
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