lumped mass

例句：

1. 1. The lumpy shape of the rock is uneven and rough.
   这块岩石的团块形状不平整且粗糙。
2. 2.The lumpy mass was difficult to move.
   这个团块状物质很难移动。
3. 3.Lumps of coal were scattered on the ground.
   煤块散落在地上。