新高级阅读前（双语）78（788）

PASSAGE SEVENTY-EIGHT

Solar still

1. A build-it-yourself solar still is one of the best ways to obtain drinking water in areas where the liquid is not readily available. 

2.Developed by two doctors in the U.S. Department of Agriculture, it’s an excellent water collector. 

3.Unfortunately, you must carry the necessary equipment with you, since it’s all but impossible to find natural substitutes. 

4.The only components required, though, are a 5 x 5 sheet of clear or slightly milky plastic, six feet of plastic tube, and a container—perhaps just a drinking cup—to catch the water. 

5.These pieces can be folded into a neat little pack and fastened on your belt.

6.To construct a working still, use a sharp stick or rock to dig a hole four feet across and three feet deep.

7.Try to make the hole in a damp area to increase the water catcher’s productivity. Place your cup in the deepest part of the hole.

8.Then lay the tube in place so that one end rests all the way in the cup and the rest of the line runs up—and out—the side of the hole.

9.Next, cover the hole with the plastic sheet, securing the edges of the plastic with dirt and weighting the sheet’s center down with a rock. 

10.The plastic should now form a cone with 45-degree-angled sides. The low point of the sheet must be centered directly over, and no more than three inches above, the cup.

11.The solar still works by creating a greenhouse under the plastic. Ground water evaporates and collects on the sheet until small drops of water form, run down the material and fall off into the cup. 

12.When the container is full, you can suck the refreshment out through the tube, and won’t have to break down the still every time you need a drink.

第七十八篇

太阳能蒸馏器

1.在没有水的地区，自己建造太阳能蒸馏器是获得饮用水的最好方法之一。

2.它是由美国农业部的两位医生开发的，是一种出色的集水器。

3.不幸的是，您必须随身携带必要的设备，因为几乎不可能找到天然的替代品。

4.然而，唯一需要的组件是一张5×5的透明或略带乳白色的塑料片，6英尺长的塑料管和一个容器(可能只是一个饮用杯)来接水。

5.这些碎片可以折叠成一个整洁的小包，系在你的腰带上。

6.为了建造一个工作釜，用一根锋利的棍子或岩石挖一个四英尺宽，三英尺深的洞。

7.尽量在潮湿的地方打孔，以提高捕水器的效率。把杯子放在洞的最深处。

8.然后把管子放在合适的地方，这样一端就可以一直放在杯子里，剩下的部分就可以从洞的一边向上伸出来。

9.接下来，用塑料片盖住洞，用泥土固定塑料片的边缘，用石头把塑料片的中心压下去。

10.塑料现在应该形成一个45度角的圆锥体。床单的低点必须在杯子的正中央，并且不超过三英寸。

11.太阳能仍然通过在塑料下面制造温室来工作。地下水蒸发并聚集在床单上，直到形成小水滴，顺着材料流下，落在杯子里。

12.当容器装满时，你可以通过管子把饮料吸出来，而不必每次需要喝水时都拆开蒸馏器。