One way to picture it: this block was put in place before anyone started. Think of the theatre, where a piece of scenery is built, carried on and stood exactly where it belongs, long before the audience arrives. Whatever the word points at — a scene, a move, a whole operation — it is the part that was arranged first and then carried out, not made up on the spot.
可以想成這樣一幅畫面：這一塊，是開演之前就先擺好的。劇場最容易看見：一塊景片做好、搬上台、放到定位，觀眾都還沒進場。set 帶著「先擺好、固定下來」的感覺，piece 是「一段、一塊」。不管它後來指的是戲裡的一場、球場上的一套跑位，還是一整套行動，共同點都在這裡——先排好，再照著走，而不是臨場才想。
登入就可以看每一支怎麼連回核心畫面。