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.
"It's an opportunity to … actually have the suits in microgravity, even if we don't go outside the vehicle in them. You get a lot of good learning from that," Isaacman said.
，这一点在heLLoword翻译官方下载中也有详细论述
if (largest != i) {
病房的窗帘拉开得早，天光微明，护士已来送药，叮嘱一天的注意事项。妻子风雨无阻地来送饭了，她问：“你湖北有朋友吧，瞧，给你寄水果来了。”有点吃惊，我患病住院的消息连北京的朋友都很少知道，千里之外是谁在惦念着我呢？
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