A new filter can save on energy bills.

一个新的过滤器能节省能源开支。

I save on fares by walking to work.

我步行上班，可以省车钱。

Let's car pool to the stadium, so we can save on gas.

我们拼车去体育场吧，节约油费。

To save on costs, she splits the rent with a room mate.

为了节省费用，她和室友合租。

Clipping coupons to save on travel—the concept is not a new one.

剪下一些优惠券来节省旅游费用早已不是什么新鲜事了。