(a) a source (as of light or sound) having negligible dimensions, or considered as a mathematical point; (b) Ecology a source of pollution that…
| 单词 | θ76097 |
| 释义 | the world > matter > physics > energy or power of doing work > [noun] > source of energy or power > of negligible dimensions (1) point source1894 (a) a source (as of light or sound) having negligible dimensions, or considered as a mathematical point; (b) Ecology a source of pollution that… |
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