Terminal applications have a “cursor” that they can move around, just like a text editor. You can tell that cursor “go to line 3, delete everything, then print out this new text” by using VT100 sequences. And you can use it to replace existing characters with new ones, without re-emitting a whole line.
致力非凡之事业，必有非凡之精神。
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Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
We have not yet received direct communication from the Department of War or the White House on the status of our negotiations.，推荐阅读51吃瓜获取更多信息
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Crawler -- Parser : uses