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1·A separate disease, acute oak decline, is killing oaks, while chestnut trees have been felled across the country because of infections spread by moths.

另一种疾病——急性栎树衰退病正在杀死大量的栎树，同时由于此病的传染性能借助蛾子传播，栗树也在全国范围内被砍伐。

2·Truffles grow underground among the roots of oak, elm , chestnut, pine, and willow trees where they form a symbiotic relationship with their environment.

块菌生长在地下土层中，与橡树、榆树、栗树、松树及柳树的根以及它们所处的自然环境形成共生关系。

3·Truffles grow underground among the roots of oak, elm, chestnut, pine, and willow trees where they form a symbiotic relationship with their environment.

块菌生长在地下土层中，与橡树、榆树、栗树、松树及柳树的根以及它们所处的自然环境形成共生关系。

4·Chestnut is in the family Fagaceae which also includes oak and beech.

栗属植物属山毛榉科，此科还包括橡属和山毛榉属。