模块让你能够将 Racket 代码组织成多个文件和可重用的库。
6.1 Module Basics
6.1.1 Organizing Modules
6.1.2 Library Collections
6.1.3 Packages and Collections
6.1.4 Adding Collections
6.1.5 Module References Within a Collection
6.2 Module Syntax
6.2.1 The module Form
6.2.2 The #lang Shorthand
6.2.3 Submodules
6.2.4 Main and Test Submodules
6.3 Module Paths
6.4 Imports: require
6.5 Exports: provide
6.6 Assignment and Redefinition
6.7 Modules and Macros
6.8 Protected Exports