getting rid of the source of infection

例句：

1. 1. We need to get rid of the old furniture in the room.
   我们需要把房间里的旧家具扔掉。
2. 2. The pesticide will help us get rid of the weeds in the garden.
   这种杀虫剂会帮助我们除掉花园里的杂草。
3. 3. They are trying to get rid of the problem by working together.
   他们试图通过共同努力来解决这个问题。