1
an earthwork
earthwork 作“土垒”解时为可数名词，可用不定冠词 a 修饰。
An earthwork was built along the ridge.
沿山脊建起了一座土垒。
土垒；土筑防御工事
earthworks — plural of earthwork
先理解核心含义，再看它在真实句子里的用法。
土垒；土筑防御工事
a rampart made of earth
An earthwork was built along the ridge.
沿山脊建起了一座土垒。
用土建造的结构,尤指用于防御或防洪的堤岸。
Any structure made from earth, especially an embankment used for fortification or flood control.
土筑壁垒
an earthen rampart
The ancient earthwork still rises several meters above the surrounding fields.
这座古老的土垒仍然高出周围田野几米。
Visitors can walk along the top of the Iron Age earthworks.
游客可以沿着铁器时代土筑防御工事的顶部行走。
The soldiers quickly built an earthwork to protect their camp from attack.
士兵们迅速筑起一道土垒来保护营地免受攻击。
earthwork 作“土垒”解时为可数名词，可用不定冠词 a 修饰。
An earthwork was built along the ridge.
沿山脊建起了一座土垒。
复数形式 earthworks 表示多处土垒或土垒群；作主语时谓语动词用复数。
The earthworks are still visible from the road.
这些土垒从公路上仍然清晰可见。
Not this
They built earthwork to protect the city.
Use this
They built an earthwork to protect the city.
earthwork 是可数名词，表示“一座土垒工事”时前面需要冠词；汉语中没有冠词，而且“土方工程”常被当作不可数概念，所以容易漏掉 an。
Not this
There are several ancient earthwork near the river.
Use this
There are several ancient earthworks near the river.
several 后必须接可数名词复数，earthwork 的复数形式是 earthworks；这里错误地保留了单数形式，缺少词尾 -s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
古老的土垒
The hill is crowned by ancient earthworks.
山顶上环绕着古老的土垒。
防御性土垒
Soldiers hurried to build defensive earthworks before dawn.
士兵们赶在黎明前修筑防御性土垒。
铁器时代土垒
Archaeologists mapped the Iron Age earthworks near the river.
考古学家绘制了河边铁器时代土垒的地图。
土筑防御工事
The museum displays a model of the old earthwork fortifications.
博物馆展出了旧土筑防御工事的模型。
土垒的修建
Construction of the earthworks took several months.
修建这些土垒花了数月时间。
Use earthworks naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记法：earth（土）+work（工程），泥土筑起的工事就是earthwork。
语域：formal 常见场景：军事历史书籍、考古报告、防御工事说明 该词比较正式，多用于军事历史或考古等书面描述；日常口语中较少单独使用 earthwork，通常会说土墙、土垒等更具体的说法。
这些词中，-work 都读 /wɝk/，与 earthwork 的后半部分同音；earth 读 /ɝθ/，是 earthwork 的前半部分。注意：hearth 拼写像 earth 前加 h，但读 /hɑrθ/，不要混淆。
Dictionary facts from ECDICT, WIKTIONARY.