back clearance

例句：

1. 1. The printer needs to back up the paper before printing.
   打印机在打印之前需要将纸张后退。
2. 2.The car's back clearance is too low, which can cause problems when driving on narrow roads.
   汽车的后部间隙太低，这在狭窄的道路上驾驶时可能会导致问题。
3. 3.The artist carefully calculated the back clearance of the sculpture to ensure it would fit perfectly into the space.
   艺术家仔细计算了雕塑的后部间隙，以确保它能够完美地适应空间。