The coverage of BeO on the specimen surface came from the preferential oxidation of beryllium due to the occurrence of residualoxygen in the vacuum system.
氧化铍在表面的覆盖来源于真空中残余氧气在样品表面的化学吸附，从而导致了铍的择优氧化。
2
The effect of the combustor temperature, pressure and coefficient of residualoxygen was experimentally investigated when the fuel was injected into the combustor.
对燃料喷入时的燃烧室温度、压力及推进剂余氧系数等工作参数进行了试验研究。
3
A century earlier, Henry Cavendish had noted the existence of a residual gas when oxygen and nitrogen are removed from air, but its importance had not been realized.