They fill the container with pure air made by evaporating liquid nitrogen and liquid oxygen, and add water vapour and some trace gases.

他们将容器充满由蒸发液态氮和液态氧得到的纯空气，再加入水蒸气和一些痕量气体。

youdao

In the refrigerant container (11), a liquid nitrogen layer (13) on the cryogenic temperature side and a nitrogen gas layer (14) on the normal temperature side are arranged next to each other.

在该制冷剂槽(11)中，低温侧上的液氮层(13)和室温侧上的氮气层(14)彼此相邻布置。

youdao

They fill the container with pure air made by evaporating liquid nitrogen and liquid oxygen, and add water vapour and some trace gases.

ECONOMIST: Climate change: Bubbling up | The