Bournonite crystals belong to the orthorhombic form of short columnar and plate, brittle, with metallic luster, often Chenggang grey to dark grey.
车轮矿晶体，属斜方晶系，呈短柱状和板状，性脆，具有金属光泽，常呈钢灰色至暗铅灰色。
Ductile and brittle materials behave differently in compression test as well. The compression test is conducted on short cylindrical specimens placed between parallel plates.
塑性和脆性材料在压缩试验中表现的特性是不相同的。压缩试验是把短圆柱形试件放在两平行平板之间进行的。
Short columns can induced brittle failure, strengthen it with additional stirrups, which shearing capacity can meet the seismic requirements.
短柱引发结构脆性破坏，采用加箍筋办法对其加强，其抗剪承载力可满足抗震要求。
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