苹果是世界上最重要的果树树种之一。

Apple is one of the most important fruit trees in the world.

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在2012年的一项调查中，71%的果树种植者和近80%的葡萄干和浆果种植者表示他们劳动力短缺。

In a 2012 survey, 71 percent of tree-fruit growers and almost 80 percent of raisin and berry growers said they were short of labor.

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果树种植户每年可以从养牛养猪户那里购买一批粪肥建起沼气池，然后添加修剪下来的果树树枝。

Fruit tree farmers can buy one load of manure a year from a cow or pig farm to start their digester and add wood pruned from fruit trees.

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