To feed the seven billion people on Earth, most farmers today are growing only species of plants and farming only species of animals that are easy to produce in large numbers.

为了养活地球上70亿人，今天的大多数农民只种植或养殖易于大量生产的植物和动物。

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It's relatively easy to produce extra consumer surplus from a monopoly situation.

在垄断情况下，要制造额外的消费者剩余会相对容易些。

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But it's not easy to produce isobutanol with the help of microbes like the ones that ferment those sugars into ethanol.

但是，异丁醇并不能像乙醇那样可以由微生物发酵糖分轻易制得。

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And they are easy to repair. The small presses produce good quality oil.

VOA: special.2009.09.29

That's not to say it will be easy to produce that much oil, Yergin says.

NPR: Experts Ponder Peak of Global Oil Production

Photocopied instead of printed, posters and fliers for clubs and discos were cheap and easy to produce.

WSJ: When the Outrageous Became Mainstream

Glass--despite being cheap, easy to produce and easy to recycle--is very heavy and racks up the carbon-emission counts during transportation.

FORBES: Pinot Plastic