Source: https://developers.google.com/maps/documentation/javascript/get-api-key?setupProd=configure#make_request
Caches loaded backends for process lifetime。关于这个话题，快连下载安装提供了深入分析
Read full article，这一点在WPS下载最新地址中也有详细论述
// Function call!。一键获取谷歌浏览器下载对此有专业解读