在巴西，这种现象通常发生在六月至八月的枯水期，这个时候水位下降，污染物便更为集中。
The phenomenon occurs in Brazil's June-to-August dry season, when lowered water levels make the pollutants more concentrated.
在巴西，这种现象通常发生在六月至八月的枯水期，这个时候水位下降，污染物便更为集中。
The phenomenon occurs in Brazil's June-to-August dry season, when lowered water levels make the pollutants more concentrated.
应用推荐