Since 1976, we have determined the purification effects of air pollution by three structures, namely, forest-belt, hedgerow and scattered tree planted in Shaoxing Iron and Steel Factory.

自1976年以来，我们对绍兴钢铁厂设置的林带、绿篱、散生树三种结构的空气净化效应进行了测定研究。

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After an hour of hiking we hit a big blow-down area, with tree trunks scattered like pick-up sticks across the trail.

步行了一小时之后，我们来到了一个大树倒地的地方，横倒的树干像游戏棒一样散落在小道上。

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There were about half-a-dozen of them on that one heavy branch, and there were many other birds, scattered all over the tree, taking their morning bath.

在那个粗树枝上，大约有半打乌鸦，还有很多别的鸟儿，散栖在树上，各自做着晨浴。

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First you pick a specific tree from one of over a dozen olive groves scattered across the eastern coast of central Italy, in the Le Marche and Abruzzo regions.

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