文 | 闻旅派，作者 | 郭鸿云，编辑 | Sette
Your application doesn’t change at all. It still reads process.env.API_KEY or $DATABASE_URL the same way it always did. The difference is where the values come from.
，详情可参考WPS官方版本下载
and then any time I want the length, get it:
SAT problem with 14 variables and 126 clauses