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.
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканамиНа севере Москвы пожаловались на зловонную квартиру-свалку с телами животных
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（九）放射性物品，是指放射性物质中放射性活度和比活度均高于国家规定的豁免值的物质。
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