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gunpowder + verb (subject)
火药作为主语，常与爆炸、燃烧等动词搭配。
Gunpowder explodes when ignited.
火药点燃时会爆炸。
火药
先理解核心含义，再看它在真实句子里的用法。
火药
An explosive mixture of potassium nitrate, charcoal, and sulfur; formerly used in guns and now mainly in fireworks.
Gunpowder explodes when ignited.
火药点燃时会爆炸。
由硝石(硝酸钾)、木炭和硫黄组成的爆炸性混合物,旧时用于枪炮,现多用于烟花。
An explosive mixture of saltpetre (potassium nitrate), charcoal and sulfur; formerly used in gunnery but now mostly used in fireworks.
硝酸钾、木炭和硫磺按75:15:10比例混合的火药,用于火炮、延时引信和烟花
a mixture of potassium nitrate, charcoal, and sulfur in a 75:15:10 ratio which is used in gunnery, time fuses, and fireworks
The soldiers stored the gunpowder in a dry, cool place.
士兵们把火药储存在干燥阴凉的地方。
Historians believe that gunpowder was first invented in ancient China.
历史学家认为火药最早是在古代中国发明的。
Fireworks contain a small amount of gunpowder to create the explosion.
烟花中含有少量火药以产生爆炸。
火药作为主语，常与爆炸、燃烧等动词搭配。
Gunpowder explodes when ignited.
火药点燃时会爆炸。
火药作为宾语，常见于使用、储存、发明等动词后。
They used gunpowder to make fireworks.
他们用火药制作烟花。
表示火药的量，常用 barrel, grain, pound 等名词。
A barrel of gunpowder was stored in the shed.
棚子里储存了一桶火药。
枪用于构成专有名词或描述性复合词，如 gunpowder tea（绿茶的一种）。
The Gunpowder Plot failed in 1605.
火药阴谋在1605年失败了。
Not this
The invention of a gunpowder changed warfare.
Use this
The invention of gunpowder changed warfare.
gunpowder 是不可数名词，不能加不定冠词 a；应直接使用 gunpowder 表示物质。
Not this
Different gunpowders have different burning rates.
Use this
Different types of gunpowder have different burning rates.
gunpowder 作为物质名词通常不可数，表示种类时可用 'types of gunpowder'，而不直接加-s。
Not this
The fireworks are made by gunpowder.
Use this
The fireworks are made of gunpowder.
表示由某种材料制成，应用 'made of' 或 'made from'；'made by' 表示由某人或某种方式制造。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
发明火药
The Chinese invented gunpowder over a thousand years ago.
中国人一千多年前发明了火药。
火药爆炸
A gunpowder explosion destroyed the old warehouse.
火药爆炸摧毁了那座旧仓库。
火药味
After the fireworks, the air was thick with the smell of gunpowder.
烟花燃放过后，空气中弥漫着浓重的火药味。
一小桶火药
A stray spark could ignite the keg of gunpowder.
一点火星就可能点燃那桶火药。
火药残留物
The forensic team detected gunpowder residue on the suspect's jacket.
法医小组在嫌疑人夹克上检测到火药残留物。
记住，记住十一月五日，火药、叛国与阴谋。
In Britain, the Gunpowder Plot is remembered every year with bonfires and fireworks.
在英国，人们每年都用篝火和烟花来纪念火药阴谋。
Use gunpowder naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
「枪(gun)」发射时喷出的「粉末(powder)」,正是火药;烟花里也有它。
语域：neutral 常见场景：军事历史、烟花制造 gunpowder 是通用词，通常指由硝石、木炭和硫磺混合而成的火药，多用于军事历史或烟花制造等语境。语气中性，正式与非正式场合均可使用。
不可数名词
Dictionary facts from ECDICT, WIKTIONARY.