有三个字符串如何匹配同时包含两个关键字的字符串 str1 = "this is the first check run" str2 = "the first run" str3 = "the first time runing" 有两个关键字(“first ”、”check “) 正则表达式怎么写 然后匹配到str1 // regExp (?=.*我是谁)(?=.*C)^.*