AI could prove as transformative as its most optimistic backers are predicting.
// 注意：slice(0, 负数)会返回空字符串，需兼容（比如stack长度<k时，slice后为空）
，这一点在safew官方下载中也有详细论述
// Define the side effect, but don't run it yet
它踩中了时代最甜的红利，用流量缔造了神话，却在红利退潮后，暴露了品牌的底层缺陷。
Not the day you're after? Here's the solution to yesterday's Strands.