| 单词 | 自由落体 |
| 释义 | 〔parachute〕Any of various similar unpowered devices that are used for retarding free-speeding or free-falling motion.缓降物：用于阻碍加速前进或自由落体运动的几种类似无动力装置中的一种〔dive〕To descend nose down at an acceleration usually exceeding that of free fall. Used of an airplane.（飞机）俯冲：通常以远大于自由落体的加速度下滑。用于飞机〔skysurfing〕The sport of performing maneuvers or stunts during free fall while riding on a skyboard.空中冲浪：踩在滑雪板时自天空如自由落体般落下时表演花招或是惊险特技〔microgravity〕An environment in which there is very little net gravitational force, as of a free-falling object, an orbit, or interstellar space.微重力：对于自由落体、轨道、或是星球间空间有着非常微弱净重力的环境 |
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