understanding

She showed great understanding of the complex scientific principles.

她展现了对复杂科学原理的深刻理解。

For peace to exist in the region there needs to be a much improved understanding between all the parties concerned.

为了地区和平，需要有关各方大力增进彼此的谅解。

We bought the sofa on the understanding that we could return it if it didn't fit in the room.

我们买下这个沙发，前提是不合适可以退货。