tiàosǎn / yùndòngyuán / zài / dǎkāi / jiàngluòsǎn / qián / huì / jīnglì / jǐshí / miǎo / de / zìyóu / jiàngluò

跳伞运动员在打开降落伞前，会经历几十秒的自由降落。

Before opening their parachutes, skydivers experience several dozen seconds of free fall.