One picture holds this word: a low seat resting on two pairs of short metal blades, sliding down a chute of ice with nothing pushing it but gravity. Everything else the word means is either that object, the racing built around it, or the act of getting in and riding it.
這個字可以想成一個畫面：一台很低的車，底下裝著兩對短短的金屬滑刀，沿著一條冰做的滑道往下衝，推它的只有重力。其他意思都繞著這個畫面轉——那台車本身、用它來比時間的那項運動，還有「坐上去滑一趟」這個動作。
From the word’s history
The name is bob + sleigh: a sleigh whose runners are two short bobs rather than one long blade running the whole length. It is attested as bob-sled from 1839, long before the sport existed, so the blades in the core picture are literally written into the name.
名字本身就是 bob 加 sleigh。sleigh 是雪橇，bob 指的是底下那組短滑刀——一般雪橇的滑刀一路通到底，這種車卻用兩組短的。1839 年就有 bob-sled 這個寫法，比這項運動還早。所以核心畫面裡最關鍵的那組滑刀，字面上就寫在名字裡了。
Wiktionary, "bobsleigh"
登入就可以看每一支怎麼連回核心畫面。