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方法。但这个实验按课本介绍的装置,做起来很不方便;而且书上讲的那几种半透膜,有的不容易搞到(如膀胱膜,肠衣),有的做起来既麻烦又不好用(为火棉胶
method. But this experiment is very inconvenient to do with the devices introduced in textbooks; and the semipermeable membranes that are mentioned in the book are not easy to find (such as bladder membranes, casings), and some are both troublesome and not good. Use (for cotton glue