Abelson解释道，可以通过按屏幕上的按钮来开启这一功能，以备某个周末晚上他想让朋友们知道他在哪里。
An onscreen button would turn on the program, Mr. Abelson explained, for perhaps a few hours on a Saturday night when the person wanted his friends to know where he was.
他回答道：“嗯，我是想确保晚上的时候，没有人从后面撞到我们，晚上到处都没有灯呢。”
He shouted back, "Well, I have to make sure no one bumps into us from behind at night-there are no lights anywhere!"
“晚上好，”他说，“我想和利厄·乔纳森说话。”
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