The Arbor Day originated in the United states.

植树节起源于美国。

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The Arbor Day is up, let's go planting some trees!

植树节到了，我们去种树吧！

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Not only are they incredible timesavers, the company has partnered with the Arbor Day Foundation to plant a tree for every app purchased.

这款应用不仅极其省时间，公司也与植树节基金会合作，每卖一份应用，就会值一棵树。

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For each tree used in production, 100 are replanted through Vers' partnership with The Arbor Day Foundation and the U.S. Forestry Service.

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He'd won the book in an Arbor Day poster contest for schoolkids that had coincided with a citywide tree-planting program administered by the Department of Parks and Public Property.

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The design of his winning poster was based on a red two-cent stamp in my collection commemorating the sixtieth anniversary of Arbor Day.

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