1. The essay introduced membrane technology in pharmaceutical crystallizing and it's feature mainly, especially development in future. 本文主要介绍了膜技术在药物结晶中的应用和特点，以及未来发展趋势。
2. Crystallizing the protein: Although a lot more complex, this is similar to putting sugar into a cup of water and letting it sit for a while. 使蛋白质结晶：这就好比把糖置入一杯水中并保持一段时间一样，当水蒸发之后，微小的糖晶体就会显现出来。
3. The nonlinear system with time-delay usually exists in the industry crystallizing process, so traditional control strategy can not meet the industry's requirement. 由于工业结晶过程存在非线性和滞后现象，因此采用常规的控制策略已经达不到工业生产的要求。
