Agricultural non-point source pollution had no certain pollution source which had obvious potential, complexity and invisibility.
污染源，具有明显的潜在性、复杂性和隐蔽性。
Agricultural non-point source pollution had no certain pollution source which had obvious potential, complexity and invisibility.
污染源，具有明显的潜在性、复杂性和隐蔽性。
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