树木所起的作用不止于保持水土。树木还吸收水份、防止洪水突发，并使河流不至于含有可杀死鱼类的泥沙沉淀。

Trees do more than keep the soil in place. They also soak up water and prevent flash floods, and keep rivers clear of sediment that can kill fish.

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多晶硅能促进硅片内的氧沉淀成核和生长，起内吸杂作用。

The polysilicon can enhance oxygen precipitation nucleating and growing, acting as the intrinsic gettering.

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