Many tankers have finished long-term contracts to store oil .

许多油轮已完成了储油的长期合同。

More oil is spilled from tankers than from offshore wells .

油轮泄露的原油量要比离岸钻井多。

Fracking requires oceans of water , brought in by fleets of noisy tankers .

水力压裂法要求使用海水，这需要通过使用噪音很大的油轮进行运输。

The outlook for tankers is less clear because of the volatility of crude-oil prices .

由于原油价格的波动性，油轮市场的前景没那么清晰。

The requirement for double-hulled tankers spurred the shipping industry to modernize with much safer ships .

对双壳油轮的需求刺激了船舶工业的现代化，船变得更加安全。