oxidiser

If the hybrid rocket needs to be shut down in a hurry all you need do is turn off the pump delivering the oxidiser .

如果混合火箭发动机需要立即关掉，那么你需要做的全部事情就是关掉传送氧化剂的泵。

A rocket works by burning fuel with an oxidiser , which provides a source of oxygen for combustion . The hot exhaust gases are then blasted through a nozzle to produce thrust .

火箭发动机工作通过燃烧带有氧化剂的燃料，氧化剂提供燃烧需要的氧气，排放的热气于是通过一个喷嘴喷出以产生推力。

Solid-fuel rockets , in which the fuel and oxidiser are pre-mixed into a stable , solid propellant and then packed inside the case of the rocket , are simpler , lighter and relatively safer .

固体燃料火箭发动机的构造更简单、分量更轻，而且相对更安全。在固体燃料火箭发动机里，燃料和氧化剂被预先混合成稳定的液态推进剂，然后被塞满火箭发动机的燃料箱里。

Rockets using liquid propellants can be shut down reasonably easily by turning off the pumps delivering the fuel and oxidiser , but they tend to be complex and their propellants , such as liquid hydrogen and liquid oxygen , difficult and hazardous to handle .

使用液态推进剂的火箭发动机可以通过关闭输送燃料和氧化剂的泵而被相当容易地关掉，但是它们往往很复杂，而且它们的推进剂操作困难且有危险性，比如液态氢和液态氧。