- Oak - Wikipedia
Oak leaves and acorns contain enough tannin to be toxic to cattle, but pigs are able to digest them safely Oak timber is strong and hard, and has found many uses in construction and furniture-making The bark was traditionally used for tanning leather
- 橡树（壳斗科栎属植物）_百度百科
许多国家皆将橡树视为圣树，认为它具有魔力，是长寿、强壮和骄傲的象征。橡树材质坚硬，树冠宽大，有“森林之王”的美称。英文为 oak ，人们常把红丝带系在橡树上来表示对远方亲人的盼望与思归。
- Oak | Description, Characteristics, Types, Facts | Britannica
Oak, genus of about 450 species of trees and shrubs in the beech family (Fagaceae), distributed throughout the north temperate zone and at high altitudes in the tropics Oak species are characterized by alternate, simple, deciduous or evergreen leaves with lobed, toothed, or entire margins
- 橡木（Oak）-源于美国国树 - 知乎 - 知乎专栏
很多人错误的认为“红橡就是红色的橡木，白橡就是白色的橡木”，其实不然，红橡之所以被我们称为红橡（Red Oak），那是因为它的树叶在秋天会变成红色。
- 49 Types of Oak Trees (with Pictures): Identification Guide - Leafy Place
A visual identification guide to oak trees, including pictures of oak leaves, bark, and acorns to assist you in identifying the correct type of oak tree
- OAK中文(简体)翻译：剑桥词典 - Cambridge Dictionary
Individual oak trees are non-repeatable, and so they produce acorns in order for there to be other oak trees after the original ones die
- Oak Tree: Key Facts - Forest Wildlife
Oak trees fall into two broad categories: white oaks and red oaks White oaks generally have leaves with more rounded lobes Their acorns are generally longer and more narrow than red oak acorns, and they mature within a single growing season
- Oaks of China – Welcome to our website
According to the State Forestry Administration of China, oak forests cover 13% of the natural forest ecosystems in China, and include more than 100 species, according to the most recent classification
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