Like in other languages, a Modula-3 program must export a Main module, which can either be a file named Main.m3, or a file can call EXPORT to export the Main module.
与其他语言一样，Modula-3程序必须导出Main模块，该模块可以是名为Main.m3的文件，也可以是可以调用EXPORT以导出Main模块的文件。