11.   Secondly, there is the problem of infrequent garbage removal.

n. + removal >>共 122
hair 9.30%
snow 8.72%
dam 5.23%
mine 4.94%
laser 4.65%
trash 4.65%
debris 4.07%
tree 3.49%
garbage 3.20%
organ 2.91%
garbage + n. >>共 160
bag 20.10%
dump 14.27%
collection 9.80%
bin 7.43%
disposal 4.81%
time 4.14%
container 3.29%
pickup 1.86%
man 1.60%
service 1.35%
removal 0.93%
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