// 倒序遍历：从最后一个元素开始（核心思路！易错点1）
The problem is that so far, we have never actually cleared the entire line: we've always just written the new characters over the old characters, assuming that the string of new characters would be longer and over-write them. This is no longer true once we can delete characters.
。同城约会对此有专业解读
Soaring global energy prices as a result of the widening Middle East conflict will jeopardise Rachel Reeves’s plan to conquer inflation and rekindle growth, economists have warned as she prepares to deliver her spring forecast later today.
But in a modern twist, before they have even walked into the first room of the city’s new Ukraine Museum inside the bunker, visitors are “targeted” by a Russian drone just before its operator prepares to release the lethal shot, and see themselves in the firing line on the screen of the weapon’s camera.