1. Our neighbors keep going back and forth to Denver every week.
我们的邻居每周来往于家与丹佛市之间。

2. We'll never back down on this issue.
在这个问题上我们决不让步。

3. Mom is flat on her back in the hospital.
妈妈生病躺在医院里。

4. I told my boss to get off my back.
我告诉老板不要对我指指点点。

5. Please don't turn your back on me.
请你不要不理睬我。

6. My back's against the wall, there is nothing I can do.
我走投无路，什么也干不了。

7. We all back you up.
我们都支持你。
(来源：英语麦当劳 http://www.EnglishCN.com)