I will make my best effort!

我会做出我最大的努力的！

Still, she put her best effort into it.

即便这样，她仍然全力以赴。

With our best effort to minimal content.

用自己最大的努力，要自己最小的满足。

We expect nothing less than your best effort.

我们就是希望你尽最大的努力。

I expect you to put your best effort into everything you do.

我希望你们尽最大努力做好每一件事。