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| chemical composition; chemistry | |||
| chemical constitution | |||
| chemical component; chemical constituent | |||
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| elemental composition | |||
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| chemical composition | |||
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| chemical constituent | |||
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化学 组 成 : 27 phrases in 8 subjects |
| Agriculture | 1 |
| Construction | 1 |
| Ecology | 1 |
| General | 3 |
| Genetics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 2 |
| Technology | 15 |
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