critical thickness of oil film

例句：

1. 1. The thinning of the oil film is a keyfactor in determining the performance of the lubricant.
   油膜变薄是决定润滑剂性能的关键因素。
2. 2. In orderto improve the efficiency of the lubrication system, it is necessary to understandthe critical thickness of the oil film.
   为了提高润滑系统的工作效率，有必要了解油膜的临界厚度。
3. 3. The critical thickness ofthe oil film is influenced by many factors, including temperature and pressure.
   油膜的临界厚度受到许多因素的影响，包括温度和压力。