dollar是可数名词
比如 5 dollars
She bummed a dollar off me.
她向我讨了一美元.为什么书上的一句话Have you got a ten-pound note? 这里ten-pound 不加s呢 求解释
a ten-pound note是一个固定搭配，意为：十镑的纸币
举例：
He gave his mother a ten-pound note.
他给他母亲一张十英镑的纸币。
Carol took out a ten-pound note and handed it to me.
卡罗尔拿出一张十磅的纸币递给了我。
希望可以帮到你O(∩_∩)O~