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a + magnolia
magnolia 作可数名词指木兰树时，可加不定冠词 a。
We planted a magnolia in the backyard.
我们在后院种了一棵木兰树。
厚朴；木兰皮
先理解核心含义，再看它在真实句子里的用法。
厚朴；木兰皮
the dried bark of magnolia trees, used in folk medicine
We planted a magnolia in the backyard.
我们在后院种了一棵木兰树。
指木兰树皮（药材），不是木兰树或花。
木兰属各种树木或灌木,花朵大,叶单生。
A tree or shrub in any species of the genus Magnolia, many with large flowers and simple leaves.
各种木兰的干燥树皮,用于民间医药
dried bark of various magnolias; used in folk medicine
木兰树的花。
The flower of a magnolia tree.
木兰属的任何灌木或乔木,以其长寿和芬芳的花朵而受珍视
any shrub or tree of the genus Magnolia; valued for their longevity and exquisite fragrant blooms
The magnolia in our garden blooms early in spring.
我们花园里的木兰在早春开花。
We planted two magnolias along the driveway last autumn.
去年秋天我们在车道旁种了两棵木兰。
She pressed a white magnolia between the pages of her book.
她把一朵白色的木兰花夹在书页之间。
magnolia 作可数名词指木兰树时，可加不定冠词 a。
We planted a magnolia in the backyard.
我们在后院种了一棵木兰树。
magnolia 可作定语修饰名词，如 magnolia bark、magnolia tree。
Magnolia bark is used in folk medicine.
厚朴（木兰皮）用于民间医药。
复数形式泛指木兰这一类植物；be in bloom 表示“正在开花”。
Magnolias are in bloom in early spring.
早春时节，木兰花开得正盛。
Not this
There are many magnolia in the garden.
Use this
There are many magnolias in the garden.
magnolia 是可数名词，复数形式为 magnolias；在 many 之后必须使用复数。
Not this
I bought magnolia at the nursery.
Use this
I bought a magnolia at the nursery.
magnolia 是单数可数名词，单独使用时必须有冠词或限定词，所以要说 a magnolia。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
木兰树
The magnolia tree in front of the library is more than a hundred years old.
图书馆前面的木兰树已经有一百多年的历史了。
木兰花
The magnolia flower is a symbol of purity and nobility in Chinese culture.
木兰花在中国文化中是纯洁和高贵的象征。
木兰花瓣
The ground was covered with white magnolia petals after the storm.
暴风雨过后，地面上落满了白色的木兰花瓣。
白木兰
White magnolias are often planted in temple courtyards.
白木兰常被种植在寺庙的庭院里。
南方木兰
The southern magnolia is the state tree of Mississippi.
南方木兰是密西西比州的州树。
《钢木兰花》："含着泪水的笑是我最爱的情感。"
She is a steel magnolia—gentle and lovely on the outside, but remarkably strong inside.
她是一朵钢木兰花——外表温柔可爱，内心却异常坚强。
Use magnolia naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想花木兰：‘木兰’既是人名也是花名，magnolia就是木兰花。
语域：formal 常见场景：medicine、herbalism、botany 在医学、草药学或植物学语境中，magnolia 常指木兰科植物的干燥树皮（如厚朴），多用于正式或学术性书写；日常口语中较少这样使用。
指木兰树或花时为可数名词（复数 magnolias）；指药用木兰树皮时不可数。
Dictionary facts from ECDICT, WIKTIONARY.