例句與造句

1. However, there are a number of other types of Electrically powered spacecraft propulsion such as the Arcjet.
2. The ion thruster is not the most promising type of electrically powered spacecraft propulsion ( although the most successful in practice ).
3. It is notable for being the first commercial satellite to use fully Electrically powered spacecraft propulsion for orbit raising and station keeping.
4. Various means of electrically powered spacecraft propulsion make efficient use of reaction mass .-- Talk 20 : 51, 21 November 2012 ( UTC)
5. The satellite is propelled solely by electrically powered spacecraft propulsion, with the on-board thrusters used for both geostationary orbit insertion and station keeping.
6. It's difficult to find electrically powered spacecraft propulsion in a sentence. 用electrically powered spacecraft propulsion造句挺難的
7. During his career, Jahn worked on electrically powered spacecraft propulsion and directed several major research programs in advanced aerospace propulsion systems, in cooperation with NASA and the U . S . Air Force.
8. A "'magnetoplasmadynamic ( MPD ) thruster "'( MPDT ) is a form of electrically powered spacecraft propulsion which uses the Lorentz force ( the force on a charged particle by an electromagnetic field ) to generate thrust.
9. An electrically powered spacecraft propulsion system uses electric motor technology to propel spacecraft in outer space, most systems being based on electrically powering propellant to high speed, with some systems being based on electrodynamic tethers principles of propulsion to the magnetosphere.
10. An "'electrically powered spacecraft propulsion "'system uses electrical energy to change the velocity of a spacecraft . Most of these kinds of spacecraft propulsion systems work by electrically expelling propellant ( reaction mass ) at high speed, but electrodynamic tethers work by interacting with a planet's magnetic field.
11. Compared to chemical rockets, the thrust is very small, on the order of 83 mN for a typical thruster operating at 300 V, 1.5 kW . For comparison, the weight of a coin like the U . S . quarter or a 20-cent Euro coin is approximately 60 mN . As with all forms of electrically powered spacecraft propulsion, thrust is limited by available power, efficiency, and specific impulse.