2015年2月14日雅思小作文--流程图.docVIP

2015年2月14日雅思真题回忆之A类小作文 净化水流程图 QThe diagram below illustrates how a simple water filter is constructed and how it functions to produce clean drinking water. The process flowchart presents the structure of the water filter and its working principle for the production of clean water for drinking. 第一段：The process flowchart presents the structure of the drinking water filter and its functions to make the cleaning drinking water. 第二段：The structure of the cleaning water filter is not complicated that can be seen from the equipment like a big barrel in which it contains three filtering layers. When the impure water is poured into the filter equipment, the sand as the first layer will get rid of the straw, leaves and small stones from the water. Charcoal as the second layer plays a key role in absorbing the impure materials that can make the water cleaner ready for the following process. 第三段：As the water is flowing into the last layer, that is, gravel, it will become purified and drinkable before (it is) pumped with a pipe at the bottom of the equipment and (it is) delivered to the drinking water storage tank. The drinking water can be tapped out for daily life after its amount comes to a relatively high level in the tank. 结尾段: To sum up, the filter is an easy and effective equipment to produce the pure drinking water within short time.