unsteady diffusion

例句：

1. 1.The process of unsteady diffusion is crucial in determining the rate of chemical reactions.
   不稳定扩散过程在确定化学反应速率中起着关键作用。
2. 2. In unsteady diffusion studies, scientists are trying to understand how particles move through a liquid.
   在不稳定扩散研究中，科学家们试图理解颗粒如何通过液体移动。
3. 3.The unsteady diffusion model was developed to simulate the movement of molecules in biological systems.
   不稳定性扩散模型被开发出来以模拟生物系统中分子的运动。