電腦的整個程式由幾個模組組成，在整合之前須分別進行獨立測試。英文怎麼說？

The full computer program is made up of several modules which should be individually tested before being integrated.
電腦的整個程式由幾個模組組成，在整合之前須分別進行獨立測試。英文怎麼說？