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| conservation of mass | |||
| indestructibility of matter (定律) | |||
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| indestructibility of matter; law of conservation of matter | |||
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物质不灭 : 6 phrases in 5 subjects |
| Biophysics | 1 |
| Metallurgy | 1 |
| Sports | 1 |
| Technology | 2 |
| Wind Energy | 1 |
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