Cleaning up an oil spill in Arctic waters has not been proven possible, despite this Shell still claim that they will be able to clean up 95% of any oil spilled.

尽管壳牌公司坚持声称能够清理95%溢出的石油，但清理干净北冰洋中的溢油的可能性还未证实。

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On the horizontal vessel with the partial jacket, the calculating method of intensity and stability of the jacket and shell still has not introduced in the correlative reference.

对带有部分夹套的卧式容器，关于夹套和筒体的强度及其稳定性计算，目前还没有资料可作为参考。

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Shell has still not been able to say why the leak occurred in the first place.

壳牌仍未能说清为何泄漏在第一处发生。

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It is unclear whether Shell still has a role in this project.

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Back at Twentynine Palms, Ken Nagy, a professor emeritus in biology from UCLA studying the reproductive habits of the reptiles, held a baby tortoise in one hand, its shell still soft.

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It involved lowering the rover to the ground on cables while the landing shell was still attached to its parachute.

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