再污染

1.Mankind is warned to stop spoiling the environment.

人类受到警告不能再污染环境。

2.This paper introduced substitutes for lead,leadless frits and leadless glaze formulation design and making techniques,and then expatiated on firing of leadless glazes,plumbeous recontamination,etc.

介绍了的替代物、熔块及料的配方设计制造艺,对熔块的、的再污染等问题进行了阐述。