镰刀的英文：
sickle
scythe

参考例句：

There is a picture of the sickle on the flag
旗帜上有镰刀的图案。

And o'er the sickle bending;
弯着腰，俯身在镰刀之上；

the swish of scythes.
镰刀挥动发出的嗖嗖声

I saw you wield scythe once.
我曾经见过你挥舞镰刀。

a reaping crotchet
镰刀

A scythe equipped with such a frame.
镰刀装配有摇篮架的大镰刀

With a sweep of his arm,scythe
他用臂、镰刀一挥.

Do a jackknife
做镰刀式跳水

hang a scythe to its handle.
给大镰刀装长柄

I use a scythe for cutting grass
我用大镰刀割草。

sickle是什么意思：
n. 镰刀

And o'er the sickle bending;
弯着腰，俯身在镰刀之上；

The gardener was swishing off the tops of weeds with a sickle.
园丁正在用镰刀嗖嗖地割掉杂草的顶端。

The flag of the Chinese Communist party is emblazoned with a hammer and sickle.
中国共产党的党旗上饰有醒目的锤子和镰刀图案。

HbS (sickle-cell Hb): substitutes a Val for a Glu on the surface。
分子表面的一个Glu被一个Val取代。

African-Americans are more apt to get sickle-cell anemia.
非洲裔美国人更易于患镰型细胞贫血症。

scythe是什么意思：
n. 长柄的大镰刀,战车镰
vt. 以大镰刀割

To cut down(grass or grain)with a scythe or a mechanical device.
刈用长柄镰或机械装置割倒(草或谷物)

The sound of the scythe being whetted makes us cast more lingering looks at the flower-sprinkled tresses of the meadows
磨镰刀的声音使我们向到处点缀着花朵的草地多掷去一些依依难舍的目光。

The old man whetted his scythe so hard that a long shower of sparks flew out on the grass
那个老头使劲磨着大镰刀，一长串火星飞溅到草地上。

The old man whetted his scythe so hard that a long showers of spark flew out on the grass.
那个老头使劲磨着大镰刀，一长串火星飞溅到草地上。

"The scythe, one of the oldest and most efficient human implements, shows a remarkable degree of ergonomic engineering."
长柄大镰刀是最古老和最有效的人类工具，其设计即明显符合人类工程学。