e temperature of 5,000 degrees centigrade. The smallest kind of stars appears red in color. Their diameter is only one twentieth of that of blue stars, that is, 800,000 kilometers, and their surface temperature is only 3,000 degrees centigrade.РOne’s sin will find one out.Р坏事终归要败露。本段落的第二句话是段落主题句,说明不同颜色的星球其大小及表面温度各不相同。本段落分类标准非常清楚。段落一开始就指出星球可以按颜色进行分类。后来又明确指出星球一般被分成五种类型:兰、白、黄、橙和红色。接着,作者运用分类,清楚地层层展开,发展段落。РThere are two kinds of sports: “amateur” and “professional”. Amateur athletes do not receive money peting in sports. Olympic athletes, for example, are amateurs. They do not receive money. Professional athletes, on the other hand, do earn money. Some professional athletes earn a million dollars or more a year. They need this money to support themselves and they can save some for their future.
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