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volcano + erupt
表示“火山喷发”时，常用动词 erupt，可按实际时态变化。
The volcano erupted without warning.
这座火山毫无预兆地喷发了。
火山
先理解核心含义，再看它在真实句子里的用法。
火山
a fissure in the earth's crust through which molten lava and gases erupt
The volcano erupted without warning.
这座火山毫无预兆地喷发了。
行星表面的通风口或裂缝(通常呈山形),其岩浆房连接到行星或月球的地幔,定期将熔岩和火山气体喷出地表。
A vent or fissure on the surface of a planet (usually in a mountainous form) with a magma chamber attached to the mantle of a planet or moon, periodically erupting forth lava and volcanic gases onto the surface.
地球地壳(或其他行星表面)的裂缝,熔岩和气体从中喷发
a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
一种向上喷出火花柱的烟花。
A kind of firework producing an upward plume of sparks.
由火山物质形成的山
a mountain formed by volcanic material
The volcano erupted after years of silence.
这座火山在沉寂多年后喷发了。
We watched the volcano from a safe distance.
我们从安全距离观看火山。
The island was formed by an ancient volcano.
这座岛屿由一座古老的火山形成。
表示“火山喷发”时，常用动词 erupt，可按实际时态变化。
The volcano erupted without warning.
这座火山毫无预兆地喷发了。
用 there is 结构说明某地有火山，后接地点状语。
There is a volcano on the island.
岛上有一座火山。
volcanoes 是 volcano 的复数形式；用 that 引导定语从句修饰火山。
Volcanoes that erupt can be dangerous.
会喷发的火山可能很危险。
Not this
I saw volcano in the distance.
Use this
I saw a volcano in the distance.
volcano 是可数名词单数，不能裸用；中文说“看见火山”不需要冠词，英语必须加 a/an。
Not this
The volcano ash covered the whole town.
Use this
The volcanic ash covered the whole town.
修饰名词 ash 应使用形容词 volcanic，volcano 是名词；受中文“火山灰”直译影响，误把名词当形容词作定语。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
活火山
The island is home to an active volcano that last erupted in 2018.
该岛有一座活火山，上一次喷发是在2018年。
休眠火山
Scientists monitor the dormant volcano for signs of activity.
科学家们监测这座休眠火山，留意活动迹象。
死火山
We hiked to the top of an extinct volcano and looked into the crater.
我们徒步登上一座死火山的山顶，向火山口里望去。
火山喷发
The volcano erupts suddenly, sending ash high into the sky.
火山突然喷发，将火山灰抛向高空。
火山的山坡
Crops grow on the fertile slopes of the volcano.
庄稼生长在火山肥沃的山坡上。
处于一触即发的危险境地
The government is sitting on a volcano of public anger.
政府正处于公众愤怒一触即发的危险境地。
在火山口跳舞；无视眼前的危险而及时行乐
While the economy collapses, the executives are dancing on a volcano.
经济正在崩溃，高管们却还在火山口跳舞。
沉睡的火山；表面平静但随时可能爆发的危险事物
The ethnic tensions in the region are a sleeping volcano.
该地区的民族矛盾是一座沉睡的火山。
Use volcano 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：vol 与 volcanic（火山的）形近，can 意为‘能’，o 像火山口——火山口‘能’喷发。此为助记，非词源。
语域：neutral 常见场景：地理/地质、新闻报道、旅游、日常对话 该词为中性用语，日常对话、新闻报道和地理/地质资料中都比较常见，通常没有明显的正式或非正式之分。
复数形式可为 volcanos 或 volcanoes。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.