influent            
 noun uk/ˈɪn.fluː.ənt/ us/ˈɪn.fluː.ənt/
 [ C ] geography specialized支流 
a stream that flows into another stream
  [ U ] environment specialized流入的水,流入的液体 
water or other liquid that flows into a waste treatment centre
  There is a desire to evaluate the toxicity of the influent to municipal waste treatment plants. 人们希望评估城市垃圾处理厂流入物的毒性。 
 influent       
adjective uk/ˈɪn.fluː.ənt/ us/ˈɪn.fluː.ənt/
 流入的,注入的
flowing into something
  The influent raw sewage has a high organic concentration. 流入的原生污水中有机物浓度较高。