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| common birch (Betula alba L.，桦科) | |||
| Betula pubescens Ehrh. (荷兰、西欧海岸沙地) | |||
| Betula alba; European birch | |||
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欧洲 桦 : 14 phrases in 4 subjects |
| Architecture | 1 |
| Biology | 4 |
| Botany | 5 |
| Technology | 4 |
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