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| 烟道灰; 飞扬灰尘 | |||
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| 轻灰; 轻质纯碱 | |||
| 轻苏打 | |||
| 纯碱粉 | |||
| 轻质苏打 | |||
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light ashes : 5 phrases in 4 subjects |
| Agriculture | 1 |
| Chemistry | 1 |
| Desert science | 1 |
| Technology | 2 |
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