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cinders of sth
cinders 常以复数形式出现，指燃烧后剩下的残渣。
The cinders of the old barn were all that remained.
旧谷仓的灰烬是仅存的东西。
煤渣；灰烬
先理解核心含义，再看它在真实句子里的用法。
煤渣；灰烬
a fragment of incombustible matter left after a wood, coal, or charcoal fire
The cinders of the old barn were all that remained.
旧谷仓的灰烬是仅存的东西。
煤或木材等不完全燃烧产生的部分或大部分烧焦的物质；常随上升烟柱飘入空中,干燥条件下落地可能引发火灾
Partially or mostly burnt material that results from incomplete combustion of coal or wood etc.; it often rides the rising smoke column into the air, and it can pose a fire hazard when it lands, in dry conditions.
余烬；煤渣。
An ember.
金属熔炉的炉渣
Slag from a metal furnace.
After the campfire went out, we found a few hot cinders still glowing in the ashes.
篝火熄灭后，我们发现灰烬里还有几块炽热的煤渣在发光。
She swept the cold cinders from the fireplace into a metal bucket.
她把壁炉里冰冷的灰烬扫进一个金属桶里。
A small cinder flew out of the stove and landed on the rug.
一小块煤渣从炉子里飞出来，落在地毯上。
cinders 常以复数形式出现，指燃烧后剩下的残渣。
The cinders of the old barn were all that remained.
旧谷仓的灰烬是仅存的东西。
这个固定搭配中 cinders 始终用复数，表示彻底烧毁。
The fire burned the manuscript to cinders.
大火把手稿烧成了灰烬。
该短语强调完全烧毁，也可用于比喻。
The building was reduced to cinders within half an hour.
大楼在半小时内就化为了灰烬。
Not this
There is too much cinder in the fireplace.
Use this
There are too many cinders in the fireplace.
cinder 是可数名词，指一块块的碎渣，因此不能用 much 修饰，应使用 many 并用复数形式 cinders。
Not this
The burnt paper turned into cinder.
Use this
The burnt paper turned into ash.
cinder 指煤或木头烧后留下的坚硬碎块，而纸烧后留下的是细粉状的 ash，所以这里应改用 ash。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
煤渣砖
The walls are made of cinder blocks.
这些墙是用煤渣砖砌的。
煤渣跑道
The school used to have a cinder track.
那所学校以前有一条煤渣跑道。
火山渣锥
The volcano is a small cinder cone.
这座火山是一座小火山渣锥。
火山渣
Vents ejected volcanic cinders into the air.
火山口向空中喷出火山渣。
烧成焦炭
The chicken was left in the oven so long it burned to a cinder.
鸡在烤箱里烤得太久，烧成了焦炭。
把...烧焦；把...烤成焦炭
I forgot about the toast and burned it to a cinder.
我忘了吐司，结果把它烤成了焦炭。
使...化为灰烬；烧毁
The fire reduced the old barn to cinders in minutes.
大火几分钟内就把那座旧谷仓烧成了灰烬。
Use cinder naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
灰姑娘Cinderella总在火炉边打扫煤渣，她的名字里就藏着cinder。
语域：neutral 常见场景：家庭壁炉、户外篝火、火灾废墟 cinder 属中性常用词，多用于指燃烧后剩下的碎渣或灰烬，日常口语和书面叙述中都比较常见；正式科技语境下更常用 ash、slag 等术语。这里取通用义即可。
复数形式为 cinders。
Dictionary facts from ECDICT, WIKTIONARY.