fragmentin片断素fragmentn.碎片；片段v.使破碎；分裂fragment dimension theory块度理论fragmentized rock-strip离散元fragment of crystallizable可结晶的片段Fragments of Existing Pipe旧管道碎屑fragments initial velocity破片初速Fragment size distribution块度分布Fragmenting Warhead Rocket破片杀伤弹头火箭fragments from one's diary日记片断fragment antigen-binding抗原结合片段fragment into small pieces碎成小片