Chemical fossils Particularly resistant organic chemicals present in geological strata that are thought to indicate the existence of life in the period when the rocks were formed.
残存于地质地层中的有机化学物质，当这样的地层被发现时，可以预测出那个地层形成时期的生命活动现象。
The Portable Fresh Air Bay is folded and stored in an explosion resistant steel container called the Strata Products Fresh Air Bay Skid.
可充气式救生舱折叠存放在防爆钢容器内，该容器称作“斯特塔产品-救生舱拖撬”。
The Portable Fresh Air Bay is folded and stored in an explosion resistant steel container called the Strata Products Fresh Air Bay Skid.
可充气式救生舱折叠存放在防爆钢容器内，该容器称作“斯特塔产品-救生舱拖撬”。
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