精讲巧练
split
  【原句回放】… and there was always the possibility that it could split into smaller kingdoms. (P31)
  【点 拨】split vt. to divide a group into smaller groups 表示“分开,把…划分”,也表示“切开,撕裂”,
  split up (into) “(使)分裂; 分成(小组)”; 
  如:Just split the cake into three parts and leave one piece for Simon.
    In the past people began to split up a hill to let the water through.