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大学英语六级考试巅峰训练一本通 Model test 1
2014-08-14来源:和谐英语
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[23:33.43]by sweeping claims that the food supply is unsafe or
[23:36.20]inadequate in meeting nutritional needs.
[23:40.89]Although most of these claims are not supported
[23:42.86]by scientific evidence, the preponderance of written
[23:46.42]material advancing such claims makes it difficult
[23:49.29]for the general public to separate fact from fiction.
[23:53.25]As a result, claims that eating a diet consisting
[23:55.94]entirely of organically grown foods prevents or cures
[23:58.97]disease or provides other benefits to health have become
[24:02.50]widely publicized and form the basis of folklore.
[24:55.84]Almost daily the public is besieged by claims for
[24:58.57]“no aging” diets, new vitamins and other wonder foods.
[25:02.75]There are numerous unsubstantiated reports that natural
[25:05.66]vitamins are superior to synthetic ones,
[25:08.82]that fertilized eggs are nutritionally superior to
[25:11.79]unfertilized eggs, and the like.
[26:03.74]One thing that most organically grown food products
[26:06.32]seem to have in common is that they cost more
[26:09.60]than conventionally grown foods.
[26:11.95]But in many cases consumers are misled if they believe
[26:15.18]organic foods can maintain health and provide better
[26:17.76]nutritional quality than conventionally grown foods.
[27:11.36]So there is real cause for concern if consumers,
[27:14.70]particularly those with limited incomes,
[27:17.28]who distrust the regular food supply and
[27:19.67]buy only expensive organic foods instead.
[27:26.30]Are organically grown foods the best food choices?
[27:29.49]The advantages claimed for such foods
[27:31.31]over conventionally grown and marketed food products
[27:33.75]are now being debated.
[27:35.57]Advocates of organic foods - a term whose meaning
[27:38.21]varies greatly - frequently proclaim that such
[27:40.68]products are safer and more nutritious than others.
[27:44.28]The growing interest of consumers in the safety and
[27:46.51]nutritional quality of the typical North American diet
[27:49.97]is a welcome development.
[27:51.67]However, much of this interest has been sparked
[27:54.13]by sweeping claims that the food supply is unsafe or
[27:56.86]inadequate in meeting nutritional needs.
[28:00.13]Although most of these claims are not supported
[28:02.21]by scientific evidence, the preponderance of written
[28:05.01]material advancing such claims makes it difficult
[28:07.99]for the general public to separate fact from fiction.