叉: 叉动词[方言] (挡住, 卡住) block up; jam 短语和例子河道被冰块叉住了。 the river is blocked up with ice. 游行队伍把路口全都叉住了。 traffic was completely held up by the procession [paraders].
This fact is clearly demonstrated by the ready formation of polyethylidene and polybenzylidene from (highly reactive) diazomethane . 这个事实已由（高度活跃的）重氮甲烷快速形成聚乙叉和聚苄叉而清楚的证明。
