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| 粒子系统; 质点系统 | |||
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particle system : 18 phrases in 9 subjects |
| Automobiles | 3 |
| Aviation | 2 |
| Bridge construction | 1 |
| Earth sciences | 2 |
| Electronics | 5 |
| Genetics | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 2 |
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