我们对系统做了一些修改。

We've made a few ___modifications to the system.

虽然我对房子的当前设计非常满意，但未来我可能会做一些修改。

Although I am very happy with the current design of my house, I may make some ___modifications in the future.

新规定要求对原计划进行轻微修改。

The new regulations require a slight ___modification of the original plan.