无穷的概念几乎是人类的大脑无法理解的。
The concept of infinity is almost impossible for the human mind to comprehend.
他还演示了如何能理解将各种无穷大相加和相乘。
He also showed how one can make sense of adding and multiplying infinities.
担心用户不理解：对网站疑惑是对受众缺乏信心，他们认为有必要提供无穷无尽的讯息给用户。
A fear users will not understand: whether from a lack of confidence in their website or in their audience, they feel the need to provide endless instruction to users.
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