translation.en: It's only when you're told that you're going to be working on this problem, and then you start procrastinating, but the task is still active in the back of your mind, that you start to incubate.
translation.zh: 只有在你被告知 你要完成某一项任务之后， 然后你开始拖延， 任务的想法还活跃在你脑海里， 这时才会产生新想法。