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.
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