Definition
to incorporate or construct an additional element or structure
增加；扩建；添加
He decided to add on a bedroom to his house.
他决定在他的房子上加盖一间卧室。
The company plans to add on new features to its product line.
公司计划在其产品线上增加新功能。
We need to add on an extra step to this project.
我们需要为这个项目增加一个额外的步骤。