You can show a heart beating if you are doing a science project describing the circulatory system. Or if you like to explain how our solar system ... you want to add a 3D Graphic to your Microsoft ...
Chinese scientists have developed a new device of 3D hollow-cone structure that can greatly increase the solar-thermal conversion efficiency. The device, named artificial transpiration by Zhu Jia and ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results