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black smoke | |||
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黑烟 : 66 phrases in 16 subjects |
Automobiles | 16 |
Aviation | 1 |
Biology | 8 |
Business | 1 |
Chemistry | 1 |
Drilling | 1 |
Electronics | 2 |
General | 9 |
Household appliances | 1 |
Metallurgy | 4 |
Nursing | 1 |
Oil / petroleum | 2 |
Plastics | 4 |
Technology | 12 |
Textile industry | 2 |
Wind Energy | 1 |