There was a film of oil on water.

水面上浮有一层薄薄的油。

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Very small droplets of water suspended in a volume of crude oil, each droplet surrounded or encased in a film of oil.

悬浮在原油中的极小水滴。各水滴都被油膜包围。

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The researchers’ work began two years ago when Dr Misra, a heavy coffee drinker, left a cup unfinished and noticed the next day that the coffee was covered by a film of oil.

研究者的工作始于两年以前，当Misra博士，一个重度咖啡饮者，留下一杯未喝完的咖啡，第二天发现咖啡上面覆了一层油。

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See, your eyelids actually spread a film of oil over your eyeball which protects a thin layer of tears that allow you to keep your eye open without it drying out.

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The researchers' work began two years ago when Dr Misra, a heavy coffee drinker, left a cup unfinished and noticed the next day that the coffee was covered by a film of oil.

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