What is disadvantage of traditionary teaching ?

传统的教学扩声有什么弱点？

Nowadays price and membranes fouling was become the bottle-neck of nf application . Membranes technology will replace the traditionary separation one day as nf technology maturated further .

现阶段纳滤膜价格和膜污损已成为应用的瓶颈，随着技术的进一步成熟，膜法处理系统将会逐步代替传统分离技术。