spacing of holes

例句：

1. 1. The engineer calculatedthe spacing of holes in the wallto ensure it was safe for pedestrians.
   工程师计算了墙上孔的间距，以确保行人安全。
2. 2. The manufacturer has to payattention to the spacing of holes inthe product to meet safety standards.
   制造商必须关注产品中孔的间距，以满足安全标准。
3. 3. The construction company inspected thespacing of holes in the floor toensure it was level and stable.
   建筑公司检查了地板上孔的间距，以确保它是水平的和稳定的。