在表面涂上薄薄的一层胶水.Apply a thin coating of glue to the surface.他们发现了如何在表面薄薄的一层上形成影像。They discovered how to form the image in a thin layer on the surface.在表面上发生吸附作用的固体叫吸附剂.The solid on whose surface adsorption occurs is called ...