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a/the viaduct over/across [river/valley]
viaduct 常与 over/across 连用，表示跨过河流或山谷。
The new viaduct over the river will open next year.
河上新建的高架桥将于明年通车。
高架桥
viaducts — plural of viaduct
先理解核心含义，再看它在真实句子里的用法。
高架桥
a bridge with a series of arches supported on piers, carrying a road or railroad over a valley
The new viaduct over the river will open next year.
河上新建的高架桥将于明年通车。
跨过山谷或其他障碍物、承载铁路或公路交通的多跨桥梁。
A bridge with several spans that carries rail or road traffic over a valley or other obstacles.
高架桥:由一系列桥墩支撑的拱桥,用于跨越山谷的公路或铁路
bridge consisting of a series of arches supported by piers used to carry a road (or railroad) over a valley
The old viaduct carries the railway across the valley.
那座旧高架桥承载着铁路穿过山谷。
We stopped the car to take photos of the stone viaduct.
我们停下车来拍摄那座石砌高架桥。
The train slowly crossed the viaduct high above the river.
火车缓缓驶过河面上方高高的高架桥。
viaduct 常与 over/across 连用，表示跨过河流或山谷。
The new viaduct over the river will open next year.
河上新建的高架桥将于明年通车。
build 与 construct 均可搭配，常用于描述工程。
Engineers built a viaduct to carry the highway across the valley.
工程师建了一座高架桥，让公路跨过山谷。
cross 后可接 viaduct，表示从上面经过。
The train crossed the viaduct in less than a minute.
火车不到一分钟就驶过高架桥。
Not this
There are many viaduct in this country.
Use this
There are many viaducts in this country.
viaduct 是可数名词，在 many 后必须用复数 viaducts；中文名词没有复数形式，容易漏掉 -s。
Not this
The train cross the viaduct every day.
Use this
The train crosses the viaduct every day.
主语 The train 是第三人称单数，一般现在时谓语动词要加 -es；cross 的第三人称单数形式是 crosses。
Not this
This viaduct was build in 1920.
Use this
This viaduct was built in 1920.
被动语态由 be + 过去分词构成，build 的过去分词是 built，不能用动词原形 build。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
石砌高架桥
The trains rumble across a nineteenth-century stone viaduct.
火车隆隆驶过一座十九世纪的石砌高架桥。
铁路高架桥
The railway viaduct spans the river in a single sweep.
这座铁路高架桥一跨过河。
建造高架桥
The engineers built a viaduct to carry the road over the valley.
工程师们建造了一座高架桥，让公路越过山谷。
引桥；引道高架桥
The approach viaduct links the highway to the main bridge.
引桥将高速公路与主桥连接起来。
驶过高架桥
Drivers cross the viaduct above the floodplain.
驾车者从高架桥上驶过洪水泛滥区。
Use viaducts naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
用“via（经由）+duct（引导）”联想：高架桥引导车辆经由山谷上方通过。
语域：neutral 常见场景：土木工程与建筑、交通与基础设施报道、旅游景点介绍 viaduct（高架桥）属于中性常用词，通常用于工程、交通、旅游等正式或一般性叙述中，口语对话里也可以自然使用；多用于明确指跨越山谷或河谷的高架桥梁场合。
via、viable、vial 均以 /ˈvaɪə/ 开头，与 viaduct 音似；-duct 结尾的词拼写相似，但在 viaduct 中 -duct 读 /dəkt/，与 duct、aqueduct、product 中的 /dʌkt/ 不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.