Sewage includes waste water and human excreta.
污水包括废水和人类粪便。
Inadequate disposal of human excreta is a major health risk in emergency situations.
在紧急情况下，人类排泄物的不适当处置是一个主要的健康危害。
An acceptable and practical system for the disposal of human excreta is the key to reducing health hazards.
减少健康威胁的关键在于建立可以接受的，实用的人类排泄物处置体系。
Sewage includes waste water and human excreta. Waste water may carry germs which are collected from human and animal excreta.
污水包括废水和人类粪便。污水里往往有人和动物粪便中的病菌。
Waste water may carry germs which are collected from human and animal excreta.
污水里往往有人和动物粪便中的病菌。
Waste water may carry germs which are collected from human and animal excreta.
污水里往往有人和动物粪便中的病菌。
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