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| 美国长三叶松 (原产于北美，巨型乔木，高达70m、为美国中部大草原的固沙造林树种); 美国黄松 | |||
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| 西黄松 Pinus ponderosa; 美国黄松 Pinus ponderosa | |||
| 西黄松 | |||
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Ponderosa pine : 4 phrases in 2 subjects |
| Desert science | 2 |
| Entomology | 2 |
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