阅读与翻译

翻译上文，要求语句通顺。谢谢老师 Sugar is so much a part of our modern life that we only really think about it when, for some 11 , we cannot obtain it. It has been known to man for at least 3,000 years, but has 12 into common use only in 13 times. Until quite recently it was considered as a medicine and as a luxury for the very rich only. Sugar is, then, 14 to our civilization. But what 15 is it? Of course, most of us recognize sugar immediately as the sweet material which we put in coffee or cakes. This common form of sugar is derived from two plants: the sugar cane （a type of grass which grows to a height of twenty feet） and the sugar beet （which grows under ground）.But there are in fact many types of sugar, and the chemist recognizes hundreds of different 16 , each coming from a different source. About 90% of the sugar is produced as food. Only 10% is used in industry for 17 other than food production. Yet sugar has great possibilities for use as the basis of chemicals. It can even be used for making plastics. In the future these potential uses will certainly be developed more than in the past. There are many reasons why we should 18 the production of sugar. Most important is that it is one of the most highly concentrated of energy foods.

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解题过程：
糖在我们现在生活中地位如此重要，以至于只有当我们因某些原因得不到它时才会意识到这点。 人们认识糖至少有3000年了，而它却是在现代才被广泛使用。 糖，那么，对于我们的文明很重要。但确切的说它到底是什么呢？当然，我们大多数人认识到糖这种材料， 是我们在做咖啡或蛋糕时把它们放到里面。这种糖常见的形式是由两个分厂：甘蔗（一种草，长到20英尺高型 ），甜菜（长在地下），但实际上在许多类型的糖。化学家认识到上百不同类型的糖，分别来自不 同的来源。 约90％的糖用作生产食物。只有10％是用于工业用途比其他粮食生产。然而，砂糖，作为化学 品的基本使用有很大的可能性。它甚至可以用于制造塑料。在未来这些潜在用途将肯定会发展比过 去更多。有很多原因，我们应该增加对糖的生产。最重要的是，它是最高度集中的能量的食物之 一。
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最终答案：略