Additional contributions to catalysis can come from bound water molecules, metal ions, or other factors. 其它促成催化的因素来自结合水分子，金属离子或其它因子。
The movement of water through wood as a result of drying takes place as mass transport of liquid water and as diffusional transport of bound water and water vapor. 木材干燥发生水分移动，表现为液态水的大量传导和结合水及水蒸气的扩散。
