A thresher is the thing or person that threshes — that beats cut grain to knock the seeds loose from the stalks. Most often it means the MACHINE.

A thresher is the thing or person that threshesthresher指打穀的東西或人 that beats cut grain to knock the seeds loose from the stalks會打割下來的穀物，把種子從稈上打鬆脫落。Most often it means the MACHINE最常見的是指機器。

In the 1800s the steam-powered threshing machine changed farm life completely, doing in a day what a village once did all winter, and "thresher" usually points to that kind of machine or to the threshing part inside a modern combine harvester. It can also mean the worker doing the job by hand, though that use is old.

In the 1800s the steam-powered threshing machine changed farm life completely在1800年代，蒸汽動力的打穀機徹底改變了農場生活 doing in a day what a village once did all winter一天就做完一個村子過去整個冬天做的事 and 'thresher' usually points to that kind of machine or to the threshing part inside a modern combine harvester而'thresher'通常就是指那種機器，或現代聯合收割機裡負責打穀的部分。It can also mean the worker doing the job by hand它也可以指用手工做這件事的工人 though that use is old不過這個用法很老了。

There is a second, quite different meaning worth knowing: a thresher (or thresher shark) is a shark with an enormously long upper tail, as long again as its body, which it swings like a whip to stun the fish it hunts. It got the name because that swinging tail looked to sailors like a flail beating grain.

There is a second, quite different meaning worth knowing還有一個完全不同、值得知道的意思 a thresher (or thresher shark) is a shark with an enormously long upper tailthresher或thresher shark是一種上尾鰭超長的鯊魚 as long again as its body長度跟牠身體一樣長 which it swings like a whip to stun the fish it hunts牠會像揮鞭子一樣揮動來打暈獵物。It got the name because that swinging tail looked to sailors like a flail beating grain牠會有這個名字，是因為那條擺動的尾巴在水手看來就像打穀用的連枷。

So one word, two pictures: a machine in a field, and a shark in the sea — joined by the idea of something long swinging down hard.

So one word, two pictures所以一個字，兩個畫面 a machine in a field, and a shark in the sea田裡的機器，還有海裡的鯊魚 joined by the idea of something long swinging down hard靠著'長長的東西用力揮下去'這個概念連在一起。