若冰层上方还存在一层固态气体层，如干冰——二氧化碳的固态形式，维持液态水存在的冰层厚度要求就能相对降低。
The ice cap could be thinner and still protect water if it were topped with a layer of frozen atmospheric gas, such as dry ice, which is solid carbon dioxide.
半导体型的金属氧化物，如氧化锡(SnO2)、氧化钛(TiO2)和氧化锌(ZnO)，经常作为活性材料用在固态气体传感器件中。
Semiconducting metal oxides such as tin oxide (SnO2), titanium dioxide (TiO2) and zinc oxide (ZnO) are routinely used as active materials in solid state gas sensing devices.
大部分这些行星的体积比原本体积较大的土星还要大，这使得它们都不太适宜人类居住——因为这些体积巨大的行星往往都是气体行星，像土星一样没有可供行走的固态表面。
Most of those planets are more massive than Saturn, which makes them unpromising from a habitability standpoint-such giants tend to be gaseous bodies without a surface to walk on.
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