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。
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。
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。
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。
Covering more than 100,000 hectares of the county's land area, poplars are today Siyang's principal tree species, increasing its tree cover from seven to 47 percent over the last 30 years.
在泗阳，种植面积超过10万公顷的杨树如今已成为该县的主要树种，而且过去三十年来，林木覆盖率也从最初的7%增加至47%。
The white pine, pictured above, was the first tree to fully repopulate, and by 1952, forest cover had increased by 70 percent—and still continues to grow.
照片显示的是完全从幼苗长起的白松林，到1952年，当地森林覆盖率已经增加了百分之七十，目前这种趋势继续在增加。
A medium-thick shelterbelt can reduce wind velocity by more than 10 percent to a distance of 20 times the tree height on the leeward side and three times the height to the windward.
中等厚度的防风林在背风侧可在20倍于树高的距离而在迎风侧则在3倍于树高的距离上减小风速10%以上。
In a simple single-threaded application, 100 percent of the Tree time would be spent in the main method.
在一个简单的单线程应用程序中，100%的Tree时间将用于main方法。
Researchers using satellite images found at least ten percent tree cover on more than one billion hectares of farmland.
研究人员利用卫星图像发现至少有百分之十的树木覆盖超过一亿公顷耕地。
Birds boost tree height up to 33 percent by munching on pesky parasites that can literally suck the life out of the tall-growing plants, a new study shows.
根据一项新研究显示，鸟儿嚼食讨厌的寄生虫，可以促进树木的高度增加达33%，因为寄生虫会把树木的生命力吸食殆尽。
The odds of finding a tree taller than the 379.1-foot Hyperion are less than 1 percent, they say.
他们说要找到一棵高度能比379.1英尺的许珀里翁还高的树的几率不到百分之一。
Food allergies, particularly allergies to peanuts and tree nuts, were a growing problem with no known cause, and they now affected 3-6 percent of children under the age of three.
成因仍然成谜的食物过敏，尤其是花生和坚果过敏，已成为日益严重的问题。3 - 6%的三岁以下儿童患有食物过敏症。
Food allergies, particularly allergies to peanuts and tree nuts, were a growing problem with no known cause, and they now affected 3-6 percent of children under the age of three.
成因仍然成谜的食物过敏，尤其是花生和坚果过敏，已成为日益严重的问题。3 - 6%的三岁以下儿童患有食物过敏症。
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