在海上石油开采和原油输送过程中经常遇到石油渗漏问题，渗漏的原油会造成油井周围海面的污染。

The oil escaping in transporting oil and bursting in oceanic oil well are happened sometimes. It will pollute the sea water around the oil well.

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天下食粮筹划署百分之九十的输送食粮的海上船只要求戎行护送。

Ninety percent of the World Food Programme's shipments arrive by sea, and ships have required a military escort.

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