改制

I made the zip gun in class out of a toy airplane launcher.

在上课时用玩具飞机发射器改制成了这。

We converted boxes into furniture.

们箱子改制成家具。

At the same time, we encouraged eligible large state-owned enterprises to get listed after the stockholding system was established.

同时，鼓励符合条件的国有大型企业改制上市。