虽然猪肺炎支原体的结构简单，但由于它对营养要求较高，故培养难度大，也是人们不能对其深入研究的一个主要原因。
It is well known that Mycoplasma hyopneumoniae has bad effect on the development of pig industry. Although its structure is very simple, it needs high nutrition in culture.
虽然猪肺炎支原体的结构简单，但由于它对营养要求较高，故培养难度大，也是人们不能对其深入研究的一个主要原因。
It is well known that Mycoplasma hyopneumoniae has bad effect on the development of pig industry. Although its structure is very simple, it needs high nutrition in culture.
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