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1. Oxford Dictionary

   point source

   • n.
     a source of energy, such as light or sound, which can be regarded as having negligible dimensions.；a localized and stationary source of pollution.

   • noun: point source, plural noun: point sources

2. • 相關詞

   non-point source

   • n.
     a source of pollution that issues from widely distributed or pervasive environmental elements: cattle are the leading non-point source of pollution in Canada today

   Oxford Dictionary

3. • 更多解釋

   point source

   • IPA[point sôrs]

   • n.
     a source of energy, such as light or sound, which can be regarded as having negligible dimensions.

   Oxford American Dictionary