septic tank
A small-scale watertight treatment system for domestic sewage in which the flow is slowed to allow sedimentation and sludge digestion by bacteria to take place.
(in the former Soviet Union) The training of teachers of handicapped children.
simple past tense and past participle of pee
plural of fissure vein
大雨の後、家庭用の小規模な密閉型汚水処理装置があふれて裏庭の井戸を汚染した。
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