你看它们的根那么发达，地下茎、竹根，鞭根和竹秆盘在一起，把整块地都盘成一个疙瘩，分不清哪是它们的头哪是它们的尾。
B-Person O B-Thing I-Thing O B-Thing O O O O O B-Thing I-Thing I-Thing O B-Thing I-Thing O B-Thing I-Thing O B-Thing I-Thing O O O O O O B-Location I-Location I-Location O O O O O B-Thing I-Thing O O O O O O B-Thing I-Thing O O O O B-Thing I-Thing O O O