12 篇文章
Hydrogen sulphide gas bubbles up from oil deposits in the earth's crust.
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Hydrogen sulphide gas bubbles up from oil deposits in the earth's crust. 硫化氢气体从地壳内的油气储层中溢出

Lava rises to the surface through this crack in the crust
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Lava rises to the surface through this crack in the crust 熔岩经过这条地壳裂缝涌上地表