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use a sickle to do sth
sickle 表示“镰刀”，use a sickle to do sth 说明用镰刀做某事。
Farmers use a sickle to cut rice.
农民用镰刀割水稻。
镰刀
sickles — plural of sickle
先理解核心含义，再看它在真实句子里的用法。
镰刀
a tool with a short handle and a curved blade, used for cutting grass or crops
Farmers use a sickle to cut rice.
农民用镰刀割水稻。
一种具有半圆形刀刃和短柄的工具,用于割长草和谷物。
An implement having a semicircular blade and short handle, used for cutting long grass and cereal crops.
用于割草或收割的刀具；有弯曲的刀片和短柄
an edge tool for cutting grass or crops; has a curved blade and a short handle
任何类似镰刀的事物,尤其是:
Anything resembling a sickle, especially:
The farmer sharpened his sickle before cutting the wheat.
农民在割麦子前磨快了他的镰刀。
The museum displays an old sickle used by villagers a century ago.
博物馆陈列着一把村民一个世纪前使用的旧镰刀。
The workers collected their sickles and left the field.
工人们收起镰刀，离开了田地。
sickle 表示“镰刀”，use a sickle to do sth 说明用镰刀做某事。
Farmers use a sickle to cut rice.
农民用镰刀割水稻。
with 在这里引出使用的工具，相当于“用……”。
He cut the grass with a sickle.
他用镰刀割草。
for doing sth 放在名词后表示用途。
This is a sickle for cutting grass.
这是一把割草用的镰刀。
Not this
He cut the grass by sickle.
Use this
He cut the grass with a sickle.
表示“用……工具”时，英语用介词 with，且可数名词前需加冠词 a/an 或限定词；‘by + 工具’通常表示交通方式或被动施事者，不用于具体工具。
Not this
The farm has two sickle.
Use this
The farm has two sickles.
sickle 是可数名词，复数形式为 sickles；中文名词没有复数变化，所以学习者容易漏掉 -s。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
锤子和镰刀
The flag displays a golden hammer and sickle.
这面旗帜上展示着金色的锤子和镰刀。
用镰刀收割
Villagers used to reap rice with a sickle by hand.
村民们过去用手拿镰刀收割水稻。
挥动镰刀
He swung the sickle back and forth to clear the weeds.
他来回挥动镰刀清除杂草。
镰刀刀片
The sickle blade has a sharp inner edge.
镰刀的刀片内缘很锋利。
镰刀柄
She gripped the sickle handle tightly while cutting the grass.
她割草时紧紧握住镰刀柄。
锤子与镰刀（共产主义标志）
The old flag still bore a golden hammer and sickle.
那面旧旗帜上仍有一个金色的锤子与镰刀标志。
镰刀月，月牙
A thin sickle moon hung low in the evening sky.
一弯细细的镰刀月挂在傍晚的天空中。
伸出你的镰刀来收割
This line is from the Bible's Book of Revelation, often quoted to symbolize the final harvest and divine judgment.
这句话出自《圣经·启示录》，常被引用以象征最后的收割与神圣审判。
锤子和镰刀
The hammer and sickle is a widely recognized Communist symbol, most famously featured on the flag of the former Soviet Union.
锤子和镰刀是广为人知的共产主义标志，最著名的是出现在前苏联的国旗上。
Use sickles naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
sickle 以 sick 开头：弯月镰刀像生病时弯下的身子，割草累到想歇(le)。
语域：neutral 常见场景：agriculture、historical writing、literary description 镰刀是中性词，多用于农业、历史或文学描述中；日常口语中直接称呼工具时也可用，比较常见于书面表达。
这些词都与 sickle /ˈsɪkəl/ 押韵，重读元音为 /ɪ/，尾音均为 /kəl/。其中前五个拼写都以 -ickle 结尾。注意 cycle /ˈsaɪkəl/ 和 suckle /ˈsʌkəl/ 拼写相似但发音不同；sick /sɪk/ 只在外形上与 sickle 的开头相似。
Dictionary facts from ECDICT, WIKTIONARY.