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未污染
| 空气
| 未污染 | |
| gen. | unpollute |
| 空气 | |
| gen. | atmos; atmosphere |
| avia. | aero |
| environ. | air |
| hydroel.st. | air |
| met. | atmosphere; atmospheric gas |
| oil.proc. | air |
| tech. | body of air |
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| unpollute | |||
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未污染 : 71 phrases in 16 subjects |
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