The modern atmosphere supports many forms of complex life that would not have been able to exist in Earth's first atmosphere because the oxygen level was too low.
现代大气层支持着许多复杂的生命形式，而这些生命在地球最初的大气层中是不可能存在的，因为当时的氧气含量太低。
If, however, they are subjected instead to pyrolysis-a process of controlled burning in a low-oxygen atmosphere-the result is charcoal, a substance that is mostly elemental carbon.
但如果经过高温分解—在低氧环境下有控制的燃烧—它将会形成木炭，其大部分是永久碳。
Such low levels of sulfate indicate that the archean atmosphere was virtually devoid of oxygen.
如此低的硫酸盐浓度，表示太古代大气中的氧气极为稀薄。
The atmosphere at high oxygen partial side of the membranes is air or oxygen, but high purity helium at low oxygen partial side.
膜的高氧分压侧分别是空气或氧气，低氧分压侧是高纯氦气。
If the boiler operation of boiler blower air distribution is not reasonable or volume deficiency, low oxygen, can make the furnace to be restored atmosphere.
锅炉鼓风机若锅炉运转中配风不合理或风量缺乏，氧量低，会使炉内发生复原性气氛。
Controlled atmosphere isolators for laboratory and small scale manufacturing processes that require a dry or low oxygen or inert atmosphere, designed and built for customers' specific applications.
气体控制隔离器，用于对需要干燥氧气或低氧或是惰性气体的实验室和小型厂房工艺，可以根据客户的应用要求做设计和定制。
Controlled atmosphere isolators for laboratory and small scale manufacturing processes that require a dry or low oxygen or inert atmosphere, designed and built for customers' specific applications.
气体控制隔离器，用于对需要干燥氧气或低氧或是惰性气体的实验室和小型厂房工艺，可以根据客户的应用要求做设计和定制。
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