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| litter collection; refuse collection | |||
| garbage collection | |||
| sanitary refuse collection | |||
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垃圾收集 : 40 phrases in 6 subjects |
| Chemistry | 1 |
| Ecology | 7 |
| Engineering geology | 1 |
| Environment | 2 |
| Technology | 28 |
| United Nations | 1 |
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