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an arboretum
arboretum 是可数名词，表示“树木园；植物园”。
The university has an arboretum on its campus.
这所大学的校园里有一座树木园。
树木园；植物园
arboreta — plural of arboretum
先理解核心含义，再看它在真实句子里的用法。
树木园；植物园
a facility where trees and shrubs are cultivated for exhibition
The university has an arboretum on its campus.
这所大学的校园里有一座树木园。
种植多种树木以供研究、教育和观赏之用的地方。
A place where many varieties of tree are grown for research, educational, and ornamental purposes.
培育树木和灌木以供展示的设施
a facility where trees and shrubs are cultivated for exhibition
We spent the afternoon walking through the arboretum, looking at different kinds of trees.
我们花了整个下午在树木园里散步，观赏不同种类的树木。
The school trip to the arboretum taught us how to identify maple, oak, and pine trees.
学校组织的树木园之旅教会我们如何辨认枫树、橡树和松树。
Volunteers planted several rare shrubs in the city arboretum last weekend.
上周末，志愿者们在城市树木园里种了几种珍稀灌木。
arboretum 是可数名词，表示“树木园；植物园”。
The university has an arboretum on its campus.
这所大学的校园里有一座树木园。
表示“在树木园”时，地点介词用 at 或 in。
The children learned about trees at the arboretum.
孩子们在树木园里了解树木。
复数形式 arboretums 和 arboreta 都正确。
Many arboretums are open to the public.
许多树木园都对公众开放。
Not this
We visited arboretum yesterday.
Use this
We visited the arboretum yesterday.
arboretum 是可数名词单数，单独使用不能缺少限定词；这里特指参观的那个树木园，因此要用定冠词 the。
Not this
There are many arboretum in the city.
Use this
There are many arboretums in the city.
arboretum 是可数名词，表示不止一个时要用复数形式；规则复数是 arboretums（也可写作 arboreta），不能仍用单数。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
参观树木园
We visited the arboretum to see the rare maple collection.
我们参观了树木园，观赏珍稀枫树收藏。
国家树木园
The national arboretum hosts an annual cherry blossom festival.
国家树木园每年举办樱花节。
树木园小径
The arboretum trail winds through labeled tree specimens.
树木园小径蜿蜒穿过带有标牌的树木标本。
树木园植物收藏
The arboretum collection includes oaks from five continents.
树木园植物收藏包括来自五大洲的橡树。
树木园园区
The arboretum grounds are open to the public year-round.
树木园园区全年向公众开放。
Use arboreta naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：arbor 是“树”，-etum 是“场所”，有树的场所就是 arboretum 树木园。
语域：neutral 常见场景：景点介绍、园艺文章 arboretum 通常指专门种植并展示树木与灌木的园地，属于中性词；比较常见于景点介绍、植物园说明或园艺文章等场合。
没有单词与 arboretum /ˌɑrbɝˈitəm/ 完全押韵。item /ˈaɪtəm/ 的读音最接近，因为都有重读元音后的非重读 /təm/，但重读元音 /aɪ/ 与 /iː/ 不同。词尾 -um 的单词（museum、momentum、quantum、stadium、spectrum）只是拼写相似，发音多为 /əm/ 或 /iəm/，不是押韵。
Dictionary facts from ECDICT, WIKTIONARY.