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| self-contamination | |||
| self-contamination (航天器自身原因造成的污染) | |||
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自污染 : 36 phrases in 10 subjects |
| Automobiles | 2 |
| Ecology | 4 |
| Economy | 1 |
| General | 2 |
| Project management | 1 |
| Space | 2 |
| Technology | 18 |
| Textile industry | 2 |
| United Nations | 1 |
| Water resources | 3 |
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