固定說法：實際怎麼運作
把技師眼中的「零件怎麼互相帶動」搬到任何一件事上：不談意義和目的，只談實際的操作步驟。這個意思要用複數，而且幾乎都帶著 of。
practical workings · noun · A2
the way something works, or the practical steps of how it is done.
運作方式；細節做法
核心畫面
Picture someone with the bonnet up, working out which part is not doing its job. What they understand is how the pieces work on each other — and that same understanding, written down as a subject, is what the plural forms of this word name.
可以想成：有人掀開引擎蓋，正在判斷哪個零件沒在做它的工作。他懂的是「零件之間怎麼互相作用」——把這種理解整理成一門學…更多收起
可以想成：有人掀開引擎蓋，正在判斷哪個零件沒在做它的工作。他懂的是「零件之間怎麼互相作用」——把這種理解整理成一門學問或一套流程，就是這個字的複數用法。From the picture
當成學問的力學與機械學
同樣的理解寫成一門課：力怎麼讓東西動、機器怎麼運作。這兩個意思也用複數 mechanics，但當學科名稱時動詞用單數（Mechanics is a branch of physics）。
physics of motion · noun · A2
the science that studies how forces make things move, stop, or change shape.
力學
Also in this word
repair person · noun · A2
someone whose job is to repair cars, bikes, and other machines.
修車師傅；機修工
原始詞典資料10 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Mechanicname
- 1
A surname.
mechanicadj/mɪˈkænɪk/
- 1
archaicmechanical; relating to mechanics or the laws of motion in physics
- […] these mechanick Philosophers being in no Way able to give an Account thereof from the necessary motion of Matter, unguided by Mind for Ends […]
- 2
archaicmechanical; precise but lifeless, as if performed by machine
- But, for the unquiet heart and brain, A use in measured language lies; The sad mechanic exercise, Like dull narcotics, numbing pain.
- 3
obsoleteOf or relating to a mechanic or artificer, or to the class of artisans; hence, rude; common; vulgar; base.
- Mechanic slaves, With greasy aprons, rules, and hammers.
- Authors both Sacred and Profane we see complain of the Level of Learning, with Mechanick Ignorance: [...]
mechanicnoun/mɪˈkænɪk/
- 1
historicalA manual worker; a labourer or artisan.
- His noble earnestness, his fidelity, his gallant shielding of her, his generous conquest of his own wrong and his own pride for her sake, are simply honourable, manly, and true. Nothing less worthy can be seen through the lustre of such qualities in the commonest mechanic, nothing less worthy can be seen in the best-born gentleman.
- The lower orders were freer than they had ever been – free […] to choose their own lay preachers, mechanics like the rest of the congregation.
- 2
Someone who builds or repairs machinery, a technician; now specifically, someone who works with and repairs the mechanical parts of a motor vehicle, aircraft or similar.
- 3
A device, method or means; a function.
- 4
video-gamesA device, method or means; a function.
- This game has a mechanic where if you run toward a ledge you automatically jump off rather than just falling.
- 5
slangA hitman.
- And from then on, his bag was silence. Silence and killing. Overnight he became the best grunt we had, a real killer, a mechanic.
- 6
gamblinggamesA cheat who manipulates the cards or dice.
- I can do other things beside burglarizing. I'm a first-class crap dealer, I'm a pretty good card mechanic, pretty good dice mechanic.
- It was so obvious. I mean, all of Nicky's half-assed mechanics, they were real signal happy.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。