例文
- where A is the equivalent absorption area and d _ c is the critical distance for reverberation.
- Where A = \ sum S \ times \ alpha is the equivalent absorption area involving the surface S of the walls and their absorption coefficient \ alpha.
- In earthworms, it is a dorsal flap of the intestine that runs along most of its length, effectively forming a tube within a tube, and increasing the absorption area by that of its inner surface.