Picture the first seconds after someone steps out of a plane. No wings, no engine, no rope, no parachute yet — nothing is attached and nothing is pushing back. Only gravity is doing anything, and the ground is still far below. Both meanings of free fall live in that one picture: in the first, a body is really dropping; in the second, it is a number dropping, with nobody able to catch it.
可以想成一個人剛跨出機艙的那幾秒。沒有翅膀、沒有引擎、沒有繩子，傘也還沒開。身上什麼都沒繫著，只剩重力在拉，底下的地面還很遠。free fall 的兩個意思都住在這個畫面裡：一個是身體真的在掉，一個是數字在掉，而且一樣沒人拉得住。
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