1
a birch / birches
表示“桦树”时是可数名词，复数形式为 birches。
A mature birch can grow quite tall.
一棵成熟的桦树可以长得很高。
桦木
birches — plural of birch
先理解核心含义，再看它在真实句子里的用法。
桦木
the hard, close-grained wood of any of various birch trees, used especially in furniture, interior finishes, and plywood
A mature birch can grow quite tall.
一棵成熟的桦树可以长得很高。
桦木属的各种树木,原产于北半球国家。
Any of various trees of the genus Betula, native to countries in the Northern Hemisphere.
各种桦树的坚硬细纹木材,特别用于家具、室内装修和胶合板。
hard close-grained wood of any of various birch trees; used especially in furniture and interior finishes and plywood
取自桦树的硬木,通常用于制作家具。
A hard wood taken from the birch tree, typically used to make furniture.
桦木属的任何桦树或灌木,具有薄而剥落的树皮。
any betulaceous tree or shrub of the genus Betula having a thin peeling bark
The carpenter chose birch for the bookshelves because it is strong and easy to paint.
木匠为书架选用了桦木，因为它坚固且容易上漆。
AI contextual example
Most of the doors in this house are made of birch, stained a soft golden color.
这栋房子里的大多数门都是用桦木做的，染上了柔和的浅金色。
AI contextual example
Birch is often used to make plywood for cabinets and shelves.
桦木常被用来制作橱柜和搁板的胶合板。
AI contextual example
my father never spared the birch
我父亲用桦木条教训人时从不手软。
WordNet
表示“桦树”时是可数名词，复数形式为 birches。
A mature birch can grow quite tall.
一棵成熟的桦树可以长得很高。
表示“桦木”（材料）时通常不可数，前面不加 a/an。
The kitchen table is made of birch.
这张厨房桌子是桦木做的。
birch 可用作定语修饰名词，如 birch bark（桦树皮）、birch wood（桦木）。
We collected dry birch bark for the campfire.
我们为篝火捡了些干桦树皮。
Not this
There are many birch in the forest.
Use this
There are many birches in the forest.
表示“桦树”时，birch 是可数名词，复数形式为 birches。汉语“很多桦树”没有复数标记，容易漏掉词尾，因此要加 -es。
Not this
The cabinet is made of birch tree.
Use this
The cabinet is made of birch.
表示“桦木”这种材料时，直接用 birch 或 birch wood，不加 tree；加 tree 会变成“桦树”，指活着的树，不是制作家具的木材。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
桦树
A tall birch tree grows beside the house.
房子旁边长着一棵高大的桦树。
桦木
This table is made of birch wood.
这张桌子是桦木做的。
白桦
The white birch has smooth, pale bark.
白桦树皮光滑而发白。
桦树皮
They used birch bark to start the fire.
他们用桦树皮生火。
桦树林
We walked through a birch forest in autumn.
秋天我们穿过一片桦树林。
做一个荡桦人，倒也不算差。
From Robert Frost's 1916 poem "Birches" — the speaker's nostalgic memory of swinging on birch trees becomes a metaphor for balancing earthly life with spiritual longing, and the closing line praises this simple joy.
出自罗伯特·弗罗斯特1916年的诗作《白桦树》——诗中对荡桦树的怀念成为调和尘世与精神的隐喻，结尾一句称赞这种简单的快乐。
Use birches naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
birch 音似“伯吃”，想象白桦树皮白净如纸，可剥下来写字，桦木家具也用它。
语域：neutral 常见场景：woodworking、furniture making、interior design 该义项指桦木木材，多用于木工、家具制作或室内装修等话题，属于普通书面语，中性偏正式；日常口语中较少单独讨论这种木材的名称。
指木材时不可数；指桦树时为可数名词，复数形式 birches。
Dictionary facts from ECDICT, WIKTIONARY.