thousands of 与thousand 的区别?

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thousands of 与thousand 的区别?

thousands of 成千上万的,是个表示模糊概念的词,前不可用数词.thousand一千,具体数字.前要加数词或a 整合一下,就是:s与of共存,后加了S的,就一定要跟OF.There are thousands of people on the street.街上有成千上万...