 |
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| albero della vita (Thuja, Thuja occidentalis); tuja m (Thuja, Thuja occidentalis) | |||
| albero della vit (Thuja occidentalis); albero del paradiso (Thuja occidentalis); tuia m (Thuja occidentalis) | |||
| cedro bianco americano (Chamaecyparis thyoides, Cupressus thyoides) | |||
| white cedar: 7 phrases in 2 subjects |
| Natural resourses and wildlife conservation | 3 |
| Natural sciences | 4 |