例句與造句

1. Robert L . Forward pioneered interstellar propulsion concepts including photon propulsion and antimatter rocket propulsion.
2. As the spacecraft velocity approaches the light velocity ( v H " c ) the efficiency of photon propulsion approaches 100 %.
3. The figure shows the energy transfer efficiency from photons to the spacecraft's kinetic energy as a function of ? = v / c ( the spacecraft velocity divided by the light velocity ) in photon propulsion.
4. It's difficult to find photon propulsion in a sentence. 用photon propulsion造句挺難的