boundary friction

例句：

1. 1. The boundary friction between two materials cangreatly affect their performance.
   两种材料之间的边界摩擦可以极大地影响它们的性能。
2. 2. In the processof material transfer, the boundary friction isa critical factor to consider.
   在物质转移过程中，边界摩擦是一个需要考虑的关键因素。
3. 3. Theboundary friction between the two surfaces can bereduced by using a lubricant.
   通过使用润滑剂，可以减少两个表面之间的边界摩擦。