曼迪在会谈上看见了他，可是她担心他只是一时兴起而已，可是她担心他只是一时性起而已，并没真把这种活动放在心上。
Mandy saw him at meetings, but she worried that he wasn’t letting the program work on him, was maybe just white-knuckling it, a funny thing to say about a black man.
“一时兴起，我写了几章给他们寄了过去”他写道。
“On a whim, I wrote a couple of paragraphs and mailed them in, ” he wrote.
他承认，挑战在于如何解释数学陈述的真假与口味或者一时兴起无关。
The challenge, he admits, is to explain why it is that mathematical statements can be definitively true or false, not subject to taste or whim.
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