Back then, their lifes depended on the natural resources of the forests, especially the birch tree.

那时，他们的生活依赖于森林的自然资源，尤其是桦树。

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The taste of the birch tree doesn't get transferred to the food.

桦树的味道并不会转移到食物上。

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Now besides the bark, Native Americans also used the wood of the birch tree.

现在除了树皮，印第安人还使用桦树的木材。

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I'd like to go by climbing a birch tree, And climb black branches up a snow-white trunk toward heaven, till the tree could bear no more, But dipped its top and set me down again.

我真想去爬白桦树，沿着雪白的树干，爬上乌黑的树枝，爬向那天心，直到树身再支撑不住，树梢碰着地，把我放下来。

耶鲁公开课 - 现代诗歌课程节选

The first step is figuring out how much sap can be extracted from the average birch tree in the Northeast using modern practices, she said.

WSJ: Birch syrup explored as add-on to maple industry

Delegates walking past the Brighton Centre were surprised to be handed the gift of a sapling silver birch tree in a bag.

BBC: TODAY'S AGENDA

His senior project involved testing the sugar content of various birch varieties, and he found that white birch New Hampshire's state tree was the sweetest.

WSJ: Birch syrup explored as add-on to maple industry