I use the internet daily for multiple purposes.

我每天都会使用互联网，有多种目的。

There were no moving parts, springs or complex materials, yet every element had multiple purposes.

笔上没有活动部件、弹簧或复杂的材料，但每个部件都有多种用途。

I would not have this in my house unless it, you know, served multiple purposes.

我不会在家里放这个，除非它有多种用途。

The French government now required a plane that could serve multiple purposes like attacking, bombing, dog fighting and assisting ground forces.

法国政府现在需要一架能够用于攻击、轰炸、斗狗和协助地面部队等多种用途的飞机。