您要查找的是不是：
- headward acceleration 头向(足到头)加速度, 足向(头到足)过载
- An instrument used to measure acceleration. 加速计，测震仪用于测量加速度的仪器
- The system undergoes no acceleration. 该体系不承受加速度作用。
- All spacemen must be able to bear acceleration. 所有太空人都应能承受加速度。
- What direction is the acceleration of the canoe? 独木船的加速度方向如何?
- It is called the centripetal acceleration. 这叫做向心加速度。
- Acceleration and velocity are both vectors. 加速度和速度都是矢量。
- Then came that acceleration of locomotion. 后来，移动加快了速度。
- An acceleration in the rate of economic growth. 经济发展速率的增长。
- This bus has good acceleration . 这辆公共汽车的加速性能很好。
- This plane has good acceleration. 这架飞机的加速度性能很好。
- The acceleration finally began to tail off. 加速度终于越来越小。
- 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。
- This rotation amounts to a small acceleration of the laboratory. 这种转动相当于实验室有一个很小的加速度。
- The characteristic surface is essentially an acceleration front. 特征曲面实质上是一种加速度波的波阵面。
- You know, Gail is very good at acceleration after 20 meters. 你知道吧，盖尔非常擅长20米后加速跑。
- Prompt acceleration with high gradients has advantages. 利用高梯度达到瞬间加速有它的好处。
- Erosion, which may include undercutting, knick point migration, headward erosion and downcutting, continues but at a much reduced rate. 一些树最初在深冲沟出现前的浅冲沟中生长，一些冲沟里没有树木生长的迹象，生长的树木就是最初分开它们的栅栏标记。
- Find the magnitude of the average acceleration during the interval. 求在这段时间间隔内平均加速度的数值。
