求翻译：而人工合成法需要先合成前提物质，但是HA体外合成的前体物质价格昂贵，难于应用于实际工业化生产中，因此这种方法仅适用于生产高分子量、高纯度具有特殊用途的HA。是什么意思？

Synthetic method to synthetic premise of substance, but ha in vitro synthesis of the precursors are expensive and difficult to be applied in the actual industrial production, so this method applies only to the production of high molecular weight, high purity special purpose ha of

The synthetic method you need to composite prerequisite material, but HA External synthetic precursors expensive, and difficult to apply to the toxins, so this method is only applicable to produce high molecular weight, high-purity HA has a special purpose.

But the artificial synthesis needs to synthesize the premise material first, but the HA in vitro synthesis precursor material price is expensive, difficulty with applies in the actual industrialization production, therefore this method is only suitable for the production macromolecular weight, high-

Synthesis and synthetic method needs to be prerequisite material, but HA in vitro synthesis of precursor substances are expensive, difficult to apply in actual industrial production, so this method is only suitable for the production of high molecular weight, high purity of special-purpose HA.

正在翻译，请等待...