求翻译：新鲜培养液和组织培养液持续通过交换器，由于浓度梯度，葡萄糖、氨基酸和维生素等营养成分通过半透膜进入组织培养液，而乳酸等代谢产物通过半透膜排出。是什么意思？

Fresh culture medium and continued through tissue culture fluid exchangers, due to the concentration gradient, glucose, amino acids and vitamins and other nutrients through the semi-permeable membrane into organizational culture, and discharged through a semipermeable membrane of lactic acid and other metabolites.