They knock around on weekends in grubby sweaters and trousers.

他们周末穿着邋遢的毛线衫和裤子到处闲逛。

I think I'll go and knock around in Qingdao.

我要去青岛转转。逛逛海滩，可能做点。冲浪。

They knock around on weekends in grubby sweaters and pants.

他们周末穿着邋遢的毛衫和裤子到处闲逛。

We need to knock around the district to find a proper man for the transplantation.

我们需要跑遍这个地区找一个合适的人来做器官移植。

We need to knock around the district to find a proper man for the organ transplantation.

我们需要跑遍这个地区找一个合适的人来做器官移植。