中段：
mesomere
midpiece
參考例句：
The hotel is set plumb in the middle of the high street.
賓館正好坐落在商街的中段。
Establishment of the Ventilation System of Sublevel Caving in Polylevel Mining
多中段開採分段崩落法通風系統的建立
Study of the effect of polyaluminium chloride on treating the grey water of paper industry
聚合氯化鋁處理造紙中段水效果的研究
