In the process of free falling of particle stream,the ambient air may be drawn into the particle stream to form a particle plume.
在微粒流的自由下落过程中,环境空气会被卷吸到微粒流中,形成微粒羽流,有关微粒羽流与环境空气关系的基础理论及数值模拟研究文献相对较少。
The experiment of “free fall” in experiment textbook of Department of Physics Loughborough University of Technology as a good example is introuduced.
以英国 Loughborough技术大学物理系实验教材中的自由下落实验为例 ,提出如何编写培养学生实践能力的实验教材应引起思考 。
This is equal to the free-fall acceleration at a height of 300 km above the earth.
这是在地面上空300km处自由下落的加速度。
Numerical Simulation and Experimental Study of Free Falling Particle Plume;
自由下落微粒羽流的数值模拟与实验研究
Numerical Simulation of Gas-solid Two-phase Flow in Free Falling Particles;
自由下落微粒流中气固两相流的数值模拟
At the same point on the earth's surface all bodies fall freely with the same acceleration g.
在地球表面的同一位置上，任何物体都以同一速度g自由下落。
Not experiencing the effects of gravity;being in a state of free fall.
失重的没有经受重力作用的；在自由下落的状态中的
fall:To drop or come down freely under the influence of gravity.
落下:因重力作用而自由下降或下落
To drop or come down freely under the influence of gravity.
落下因重力作用而自由下降或下落
descend in free fall under the influence of gravity.
在重力的作用下自由落体。
To descend nose down at an acceleration usually exceeding that of free fall.
通常以远大于自由落体的加速度下滑.
Growing from self-sown or accidentally dropped seed. Used of a cultivated plant or crop.
自生的由自己落下或偶尔落下种子而长成的。用于种植物或庄稼
A cultivated plant growing from self-sown or accidentally dropped seed.
自生植物一种由自落的或偶而落下的种子而生长出的植物
The law of freely falling bodies is stated as follows:in the absence of air the speed of a falling body does not depend on the body's weight, but only on the time of the fall.
自由落体运动定律可叙述如下：如无空气，落体的速度不取决于其重量而只取决于下落的时间。
"When I bounce up and down, I feel like a bird flying.
"当我落下，又被弹起时，我感觉自己像一支自由飞翔的鸟儿。
free fall lifeboat system
自由降落救生艇系统
The size of the British economy has slipped below that of France for the first time since 1999 thanks to the slide in the value of the pound.
由于英镑贬值，英国经济规模自1999年以来首次滑落至法国之下。
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
Rapid Solidification of Undercooled Water and Alloy during Acoustic Levitation and Free Fall;
声悬浮和自由落体条件下深过冷与快速凝固研究
Rapid Solidification of Ternary Cu_(60)Sn_(20)Pb_(20) Monotectic Alloys during Free Fall
自由落体条件下三元Cu_(60)Sn_(20)Pb_(20)偏晶合金的快速凝固