他需要证明离岸钻探的风险小于长途航行的油轮。
He needs to demonstrate that its risks are no greater than, say, those of long-haul shipping.
龙虾和螃蟹开始了航行。很快，它们发现离岸边已经很远了。
The lobster and the crab began their voyage. Soon they found themselves far from shore.
龙虾和螃蟹开始了航行。很快，它们发现离岸边已经很远了。
Thee lobster and the crab began their voyage. Soon they found themselves far from shore.
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