surface exclusion

例句：

1. 1. The company's policy on surface exclusion is clear and unambiguous.
   该公司关于表面排除的政策是明确且不含糊的。
2. 2.In the study of surface exclusion, it is important to consider the role of temperature.
   在研究表面排除时，考虑温度的作用是很重要的。
3. 3. The surface exclusion phenomenon has been observed in various materials.
   表面排除现象已在各种材料中观察到。