当我还是很年轻的年轻人的时候，我就开始搜集材料，准备写一本将被叫做<世界终结的那一天>的书。
When I was a much younger man, I began to collect material for a book to be called _The Day the World Ended_.
社会上的人是那么多，以至于我们都忘了生命有一天是会终结的，而我们并不知道那一天什么时候到来。
The density of people in society is so thick that we forget that life will end one day. And we don't know when that one day will be.
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