the job/matter in hand

UK (US the job/matter at hand)

the job or matter that is important at the present moment

当前重要的事务

Could you just concentrate on the job in hand?

你能不能集中精力做手头的工作?

If we could return to the matter in hand, we can discuss other issues later.

如果我们能够回到眼前的事情上，其他事情我们可以稍后再讨论。