Sewage includes waste water and human excreta.
污水包括废水和人类粪便。
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。
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。
应用推荐