1、用在世界上独一无二的事物前。 如：Explore the surface of the moon. 2、用在序数词、形容词的最高级前。 如：This was the first step towards achieving a peace agreement. 3、用于上文已经提到过的人或事物。 如：He bought a new car.The car was very beautiful. 4、用在表示方位、乐器和影剧院的名词前。 如：The wind is blowing from...
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