Picture a ball that does not go where the first part of its flight promised. It leaves the hand looking straight, spins hard, and bends away late — after the bat has already started moving. The damage is done by the timing, not by speed or distance: you committed to one line, and the ball took another. Every use of curveball keeps that shape.
可以想成一顆「不照你預期路線走」的球。它離開手的時候看起來直直的，強烈旋轉，最後一刻才彎開——而那時候球棒已經開始揮了。難打的不是速度，也不是位置，而是時間差：你認定了一條線，球卻走了另一條。curveball 的每個用法都留著這個形狀。
From the word’s history
Wiktionary gives the word simply as curve + ball, which is the whole picture: the ball that curves.
Wiktionary 記載 curveball 就是 curve（彎）加 ball（球），字面已經把畫面說完：那顆會彎的球。
Wiktionary entry 'curveball' (kaikki:3f6f69a190036ae4:1000571501), supplied in the evidence packet.
登入就可以看每一支怎麼連回核心畫面。