Grass, trees and other biomass feedstocks consist of a mixture of cellulose, hemicellulose and lignin, a tough material that helps plants keep their shape.

草、树和其他生物基原料是由纤维素、半纤维素以及维持植物外形的木质素组合而成的。

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We walk out of the house and can see flowers, grass, trees and animals.

我们一走出房子，就可以看到花、草、树木和动物。

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Grass trees and other biomass feedstocks consist of a mixture of cellulose hemi cellulose and lignin a tough material that helps plants keep their shape.

草、树和其他生物基原料是由纤维素、半纤维素以及维持植物外形的木质素组合而成的。

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Pollen is a fine dust that comes from grass, trees and flowers.

VOA: special.2009.07.28

It is the color of grass and the leaves on trees.

VOA: special.2010.05.23

The trees and thick grass move slightly in the wind.

VOA: special.2009.08.19

Seurat mixed in a zinc yellow to make different hues, for grass and trees, for example.

NPR: Using Science to Rescue Art

Apple hopes to raze 26 buildings on the site to make room for the "spaceship, " which will be surrounded by grass and trees.

CNN: Doug Gross,

But tucked away beyond the tangle of bushes, high grass and trees was a blue tarp that concealed the only world Dugard had known since her abduction.

CNN: Girl grew up locked away in backyard sheds