When acid rain falls on forest floors, it changes the ingredients - the 'PH level' - of the soil.
酸雨对森林地表层的土壤来说，它改变了原来的pH值'。
The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990.
《人类环境杂志》上的研究文章的作者在1980年和1990年分别检测了取自新英格兰。纽约和宾夕法尼亚20个森林土地统一地方的表层土壤样本。
With trees equal to one hectare of forest spanning 27 floors, these 365 and 260-foot emerald, twin towers will be home to an astonishing 730 trees, 5, 000 shrubs and 11, 000 ground plants.
27个楼层覆盖满了相当于一公顷森林面积的树木，这两座分别高365英尺（111米）和260英尺（79米）的高楼变成了翠绿色。 这座双塔式建筑将种满730棵树木、500棵灌木以及1.1万株地面植物。
The project, entitled Urban Forest, features a stacked set of floors that cantilever drastically from their central support.
该项目被称为“城市森林”，是有很多层层重叠的楼板戏剧般的从中央的核心筒挑出。
The wretched boy, who has recently been dragged from the forest to scrub floors in the barracks, is now sweeping away the snow, his hands numb with cold.
那个可怜的小男孩最近刚刚从森林中被抓进兵营里打扫地板，现在他正在扫雪，手都冻麻了。
As walking further, one is entering reading rooms located on several floors which are connected by an atrium, focusing the view to the forest.
继续向里走，是位于不同楼层的阅读室，与主建筑体相连接，可以看到室外的森林景观。
As walking further, one is entering reading rooms located on several floors which are connected by an atrium, focusing the view to the forest.
继续向里走，是位于不同楼层的阅读室，与主建筑体相连接，可以看到室外的森林景观。
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