中层

Male-sterility mainly results from the abnormality of mesospore,tapetum tissue and vascular bundle.

中层组织、绒毡层组织及药隔维管束异常均是雄性败育的因。

There are two other forms of arteriosclerosis (hardening of the arteries) in addition to atherosclerosis: arteriolosclerosis and medial calcific sclerosis.

脉粥样之外,还有其它两种式的脉（脉变）∶细脉和脉中层钙。