Backstraps
n. 书背，书脊；(靴子或鞋后跟上的)提带
🗣️ 情景例句
This is Alexandra Pappas, and this is my grandson Robbie,
这是Alexandra Pappas ，这是我孙子Robbie
They describe how each process goes on to the next.
表述着每道工艺间的衔接情况。
Are they your books?
这些是你的书吗？