中轉英 晤好錯文法 plx~

A rocket, simply put, is just a flying device utilizing the action-reaction force.

Water rocket distinguishes itself from solid rocket by using water as the propellent instead of hot air. {Before launching, the fuel chamber is filled with water and air. The water is at the lower part, blocked by a nozzle opening while }air at the upper part is pressurized. As air with high pressure tends to expand towards spaces with lower pressure, once the nozzle is opened, the pressurized air will flow towards the nozzle. Such expansion pushes the water out of the chamber and creates a propelling force, which grants speed to the rocket.

I added one and a half sentence to explain the chamber structure. Cause the original article is unclear about the position of all these air, water, and nozzle.

The so-called rocket,is in brief comes the flight vehicle using the action and the reacting force which pushes to front.
Water rocket and rocket biggest difference,Lies in its advancement the medium to turn the water by the high temperature air.Can fill into the air in front of the launch water rocket to reach the certain pressure ﹐Because the high pressure meets the nature to the low pressure flows ﹐Therefore is opened in the spray nozzle time,The air nature flows to the spray nozzle, But as a result of the water keeps off in the front,Therefore the volunteer fire brigade is promoted by the air the rocket,But the rocket also takes advantage of this obtains to the front speed.