only safe to consume one per day. Do you think there might be a need for purchase" The teenager asked as he stood up to leave."Need it, I'll buy!" Xiao Ai said without a moment's hesitation."A large d...ex.test(str)); // 輸出: false```**替換特定字元或模式**使用`String.prototype.replace()`方法和正則表達式，你可以很容易地替換字串中的特定模式：```javascriptlet str = "hello world";let expectedResult1 = str.replace(/world/g, "universe");consol...