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subatmospheric adj.低于大氣層的;低[次]于大氣壓的。

subatom

As compared with the pressure of carrier gas , the subatmospheric pressure is more favourable condition to atomize the hydride , so the atomization temperature was lower ( about 650 ) 由于硒化氫的原子化是在負壓下完成的,它將比常壓或載氣壓力下更有利于氫化物的原子化,因而使硒化氫原子化的最佳溫度降低。