back band

例句：

1. 1. He wore a back band on his shirt to keep it from riding up.
   他衬衫上系了一个背带，以免衬衫往上跑。
2. 2. The back band of the jacket is made of leather.
   这件夹克的背带是用皮革做的。
3. 3.The back band of the guitar is where you can adjust the tuning.
   吉他的背带是你可以调整调音的地方。