21.   Two people walking near a drainage canal were killed when the plane plowed into them.

n. + canal >>共 46
irrigation 44.59%
drainage 13.38%
sewage 4.46%
barge 3.18%
dirt 2.55%
el 2.55%
sea-level 1.91%
diversion 1.27%
crater 1.27%
sewer 1.27%
drainage + n. >>共 74
system 30.30%
ditch 19.48%
pipe 5.41%
canal 4.55%
channel 4.11%
problem 3.90%
hole 3.46%
area 2.16%
culvert 1.95%
work 1.52%
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