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.

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。

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Cut a 70-degree notch into the tree with a length of 80 percent of the trunk’s diameter.

在树根处砍一个缺口，缺口的深度应该是树木直径的80%，其角度大约为70度。

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Pecans are the only major tree nut native to the U.S., which produces about 80 percent of the world's crop.

美国山核桃是起源于美国的主要坚果树种，全世界百分之八十的山核桃产量来自于美国。

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Researchers using satellite images found at least ten percent tree cover on more than one billion hectares of farmland.

VOA: special.2009.09.01

Miami recently found that its electricity bills were 10 percent lower in areas with more than 20 percent tree cover compared to those areas without any trees, the New Scientist reports.

CNN: All About: Cities and energy consumption

Last year, Wisdom Tree saw a 42 percent increase in new money flows as a percent of assets under management, greater than any other fund company, according to Morgan Stanley Research.

FORBES: If China Is So Awful, Why Is Wisdom Tree Launching A China Equity ETF?

In the United States more than 90 percent of fruit tree and vegetable varieties found in farmers' fields at the beginning of the twentieth century are no longer there.

CNN: Feeding the future: Saving agricultural biodiversity