Water problems in the future will become more intense and more complex. Our increasing population will tremendously increase urban wastes, primarily sewage. On the other hand, increasing demands for water will decrease substantially the amount of water available for diluting wastes. Rapidly expanding industries which involve more and more complex chemical processes will produce larger volumes of liquid wastes, and many of these will contain chemicals which are noxious. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever-increasing quantities of agricultural chemicals. From this, it is apparent that drastic steps must be taken immediately to develop corrective measures for the pollution problem.
将来水的问题会变得更加尖锐复杂。不断增长的人口将大量增加城市废物,主要是生活污水。另一方面,用水需求的不断增长将使得可用于稀释废水的水量大大减少。快速发展的工业越来越多地采用各种复杂 的化学方法,从而使废水大量增多,而很多废水中含有种种有害的化学 物质。为了养活迅速增长的人口,农业必须集约化,这就会不断增加农 用化学品的用量。由此看来,必须立即采取果断行动研究污染问题的整治措施。
There are two ways by which the pollution problem can be dwindled. The first relates to the treatment of wastes to decrease their pollution hazard. This involves the processing of solid wastes prior to disposal and the treatment of liquid wastes, or effluents, to permit the reuse of the water or minimize pollution upon final disposal.
整治污染问题的方法有两种。第一种是通过废物处理减少污染的危害,包括固体废物排放? 之前?的处理和液体废物或污水的处理,从而实现水的循环利用或者尽量降低最终排放前的污染程度。
A second approach is to develop an economic use for all or a part of the wastes. Farm manure is spread in fields as a nutrient or organic supplement. Effluents from sewage disposal plants are used in some areas both for irrigation and for the nutrients contained. Effluents from other processing plants may also be used as a supplemental source of water. Many industries, such as meat and poultry processing plants, are currently converting former waste products into marketable byproducts. Other industries are exploring potential economic uses
第二种方法是开发全部或部分废物的经济利用。农田中施用农家肥 补充肥分或有机肥。有些地区使用污水处理厂排放的污水进行灌溉施肥。其他水处理厂排出的废水也可用作补充水源。现在,禽肉加工等许 多行业正在把原先废弃的下脚料加工成可供出售的副产品,其他行业也在研究废弃物的经济利用可能途径。
背1遍就想上考场四级单词 Week 6 Day 5_496_497-单词
大学英语四级词汇思马得记忆法(Smart)Smart77-89
闭着眼睛飘单词四级comment-conductor
闭着眼睛飘单词四级occupy - orbit
闭着眼睛飘单词四级lable- lest
英语短剧剧本 I Am Hungry(5人剧)
2010年12月英语四级听力练习三十八
背1遍就想上考场四级单词 Week 5 Day 7_432_433-例句
新东方赵丽词汇课堂 Lesson 139
2010年12月英语四级听力练习六
背1遍就想上考场四级单词55
小学英语短剧 远离蛀牙
英语小短剧 April Fool's Day
24篇魔术美文串记英语四级词汇 05.What I Learned in Kinderga
新东方赵丽词汇课堂 Lesson 122
小学英语小短剧 灰姑娘2
英语四六级考试技巧大窜讲(新东方)综合技巧part1
赵丽教你巧记英语单词LESSON 102
背1遍就想上考场四级单词 Week 7 Day 7_644_645-例句
星火英语点评历年四级真题2005年12月四级真题
新东方四级词汇·词根+联想记忆法词根+联想记忆法 List 11
2010年12月英语四级听力练习二十四
背1遍就想上考场四级单词 Week 3 Day 4_116
大学英语四级口语考试视频大学英语四级口语考试视频
大学英语四级考试解读第三讲 打造写作高分亮点及综合部分题型应对策略
新东方四级词汇·词根+联想记忆法词根+联想记忆法 List 13
背1遍就想上考场四级单词 Week 3 Day 2_94
新东方四级词汇·词根+联想记忆法词根+联想记忆法 List 25
背1遍就想上考场四级单词 Week 6 Day 6_524_525-单词
大学英语四级词汇(拼读版) 60
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |