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| ectoexine; sexine | |||
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外 壁 外层 : 15 phrases in 7 subjects |
| Agriculture | 4 |
| General | 2 |
| Life sciences | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Otorhinolaryngology | 2 |
| Technology | 2 |
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