The reason is that, as mentioned earlier, Scheme will rename pi and e so they don't conflict with other names in enclosing or nested scopes.
原因在于Scheme会对pi和e 进行重命名，使它们不会与包含或嵌入宏的范围中的其他名称冲突。
He shouted, "Hoo-rah Minn-e-so-tah!" This was the first organized shout, or "yell".
他喊道：“Hoo-rah Minn-e-so-tah！”这是第一次有组织的喊叫，或者称为“呐喊”。
He shouted, "Hoo-rah Minn-e-so-tah!" This was the first organized shout, or "yell".
他喊道：“Hoo-rah Minn-e-so-tah！”这是第一次有组织的喊叫，或者称为“呐喊”。
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