浄化; 精製
dissent
surrogacy
purification
audacious
繰り返し発生する
avert
slum
rustic
recur
下水, 汚水
cyberbullying
sewage
inadequate
benevolent
普及, 流行
hydrophilic
prevalence
tenuous
pedagogy
（水やガスなどが通る）パイプ, 通路
precarious
collateral
proliferate
conduit
浄化, ろ過
restructuring
filtration
inherent
marginal
淡水, 真水
labor-intensive
inexorable
preclude
freshwater
下水道のないトイレ, 野外の仮設トイレ
alleged
latrine
integrate
touchstone
汚染, 汚濁
nominal
flaw
influx
contamination
湿地, 湿原
wetland
undermine
insulate
leverage
九州大学出版会 - ワードクエスト 世界とつながる上級英単
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