ornamental + noun
作定语，说明该事物或生物的主要用途是装饰、观赏，而非生产或食用。
The garden is filled with ornamental trees and shrubs.
花园里种满了观赏树木和灌木。
观赏性的；供观赏的；作为装饰物；没有其他目的,仅为美化；为美学或装饰目的而培育的；用于美观而非实用的
decorative; serving only to make something more beautiful rather than to be useful
作为装饰物；没有其他目的,仅为美化
Serving as an ornament; having no purpose other than to make more beautiful.
为美学或装饰目的而培育的
Bred for aesthetic or decorative purposes.
用于美观而非实用的
serving an esthetic rather than a useful purpose
The vase is only ornamental, so it never holds flowers.
这个花瓶只是装饰性的，所以从来不插花。
用法提示：ornamental 作表语形容词，表示“仅作装饰、无实用功能”。
They planted ornamental cherry trees along the path for their spring blossoms.
他们沿小路种植了观赏樱花树，为的是春天开花。
用法提示：ornamental 作定语形容词，修饰 cherry trees，表示“供观赏的”。
The old clock still works, but its golden case is mainly ornamental.
那座旧钟还能走，但它的金色外壳主要是装饰性的。
用法提示：ornamental 作表语形容词，强调外观上的装饰作用。
作定语，说明该事物或生物的主要用途是装饰、观赏，而非生产或食用。
The garden is filled with ornamental trees and shrubs.
花园里种满了观赏树木和灌木。
作表语，说明某物只有装饰作用，没有实际功能；常与 purely、merely 等副词连用。
These buttons are purely ornamental; they don't fasten anything.
这些纽扣纯粹是装饰性的，它们扣不住任何东西。
用于对比，强调某物的目的是美观而非实用或功能。
The pillars are ornamental rather than structural.
这些柱子是装饰性的，而不是承重的。
grammar · medium
易错句子The vase on the shelf is just an ornamental; it has no real use.
正确表达The vase on the shelf is just an ornament; it has no real use.
ornamental 只能作形容词，不能像名词那样受 a/an 修饰。汉语“装饰品”是可数名词，对应英语的 ornament，所以“只是一个装饰品”要说 just an ornament。
grammar · medium
易错句子They ornamental the room with paper flowers.
正确表达They decorated the room with paper flowers.
ornamental 是形容词，不能作谓语动词。汉语“装饰”是动词，学生容易把 -al 结尾的形容词直接当动词用；表示“装饰某处”的动作要用动词 decorate，因此是 They decorated the room...
grammar · medium
易错句子These flowers are grown for ornamental.
正确表达These flowers are grown for ornamental purposes.
介词 for 后面必须接名词性成分，形容词 ornamental 不能单独作宾语。汉语“为了观赏”可以省略后面的名词，英语则要补出被修饰的中心名词，常见说法是 for ornamental purposes。
观赏植物
The garden is full of ornamental plants that serve no practical purpose.
花园里种满了观赏植物，它们没有实际用途。
纯粹装饰性的
The columns are purely ornamental and support no weight.
这些柱子纯粹是装饰性的，不承重。
装饰用途
These flowers are grown for ornamental purposes, not for food.
这些花是为了装饰用途而种植的，不是用来吃的。
观赏价值
The tree has great ornamental value in landscape design.
这棵树在园林设计中具有很高的观赏价值。
观赏鱼
He keeps ornamental fish in a large tank in his living room.
他在客厅的大鱼缸里养着观赏鱼。
Choose the next layer that will help you use ornamental with more confidence.
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观赏树木
The park is lined with ornamental trees that bloom in spring.
公园两旁种着春天开花的观赏树木。