the design or production of something in separate sections

We need better modularization because at the moment you need to install the whole browser to be able to use the widget. 我们需要更好的模块化，因为目前你需要安装整个浏览器才能使用小工具。

the design of an educational course as a series of modules (= separate units) that can be combined in different ways

The article examines how learning outcomes are affected by modularization. 这篇文章探讨了模块化对学习成果的影响。