What we need now is a joint effort.

目前我们所需要的是一个联合的努力。

Jane: It's the result of our joint effort.

简：那是我们共同努力的结果。

We did it together; it was a joint effort.

这是我们一起干的，是共同努力的结果。

In order to protect our Earth joint effort.

为保护我们的地球共同努力。

The latter initiative is a joint effort with the IMF.

后一刺激方案是与IMF共同努力做出的。