The acceleration is positive if the speed is increased, negative if speed is decreased.
速度增加的加速度为正加速度，速度减少的加速度为负加速度。
An apparatus in which human beings or animals are enclosed and which is revolved to simulate the effects of acceleration in a spacecraft.
航天试验离心机人和动物在其里面并旋转以模仿宇宙飞行器的加速作用的一种仪器
An instrument used to measure acceleration.
加速计，测震仪用于测量加速度的仪器
A flight garment worn by astronauts and jet pilots that presses on the lower body to maintain the blood supply to the brain during rapid vertical acceleration.
