Picture a hand doing the work — turning the handle, lifting the load, guiding the tool — with no motor and no software taking over. Everything the word does keeps that hand in the picture: the kind of job, the setting on a machine, the skill in your fingers, and even the book you keep at hand while you work.
可以想成：一隻手在做事——轉把手、搬東西、扶著工具——沒有馬達，也沒有程式代勞。這個字的每個用法都把那隻手留在畫面裡：一種工作的性質、機器上的一個檔位、手指的靈巧度，甚至是你做事時擺在手邊的那本書。
登入就可以看每一支怎麼連回核心畫面。