在其他情况下，较细的颗粒可能被除去，而沙粒大小的颗粒堆积起来形成移动的山丘或沙脊。
In other cases, the finer particles may be removed, while the sand-sized particles are accumulated to form mobile hills or ridges of sand.
下一步准备完成一个微型赛车大小、单座的原型机，而且提高系统功率并完善车在移动中的充电功能。
The next steps are to finish a go-kart–size one-seater EV prototype, boost the system's power, and perfect that car's on-the-move recharging.
另一方面，因为物体大小和移动的速度是由与之相关的参照物确定的，3D的效果很容易被像图2所模拟出来，但是图2所展示的3D效果并不很真实。
On the other hand, since object size and moving speed confirm to relative comparison with an other, a 3D effect can be deceived easily like fig.2. But the 3D effect got by fig.2 is not so real.
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