紫外线照射下，距离墨西哥湾还有很远的海湾岛国家海滨上，受到石油污染的沙砾发出亮光，遍布在沙丘上。

Many yards from the Gulf of Mexico, dunes at the Gulf Islands National Seashore appear dotted with constellations of oil-contaminated, glowing sand under ultraviolet light.

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虽然大海可以把粪便冲散，但海滨可能受到污染。

Although the sea breaks up the waste, beaches may become polluted.

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三亚是一热带海滨城市，是一个没有污染的城市。

As a tropical seaside city, Sanya is pollution free.

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