The heater's job is to prevent hydrazine fuel in a feed pipe to a unit from freezing.

加热器的工作是预防装置进料管中的联氨燃料冻结。

youdao

The impact flash may have been caused by the thermal emission from the impact itself or by the release of spacecraft volatiles, such as the small amount of hydrazine fuel remaining on board.

撞击的闪光可能来自撞击本身产生的热喷发，也可能是飞船上的挥发物，如剩余的少量肼燃料。

youdao

Here were bugs that created hydrazine, an extremely unstable compound, used as rocket fuel, that is poison to most living things.

这些微生物可以产生一种叫联氨的极不稳定的化合物，联氨通常作为火箭燃料，对多数的生物都是有毒害的。

youdao

The satellite is likely to burn up during reentry, but there's concern that it could contain hydrazine fuel, which may be hazardous to people on the ground.

NPR: Spy Satellite Expected to Return to Earth Soon

These tests apparently showed that the system used to ignite the craft's hydrazine fuel could not operate effectively at the cold temperatures expected during the flight to Mars.

BBC: MPL Nasa

It was claimed that the system used to ignite MPL's hydrazine fuel could not have coped in the extreme cold of space and that the engines were only installed in the spacecraft after an unnamed individual had falsified test data.

BBC: You are in: Sci/Tech