As oceans reopen new crust is pulled forth from volcanoes; old crust is destroyed as tectonic plates return to the depths from which those volcanoes ultimately draw their fire.

当各大洋重新出现时，新地壳便从各个火山喷涌而出；当构造板块移回到海底深处(这些火山的最终喷发就是源于海底深处)时，旧地壳便被摧毁。

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Old crust is destroyed as tectonic plates return to the depths from which those volcanoes ultimately draw their fire.

当构造板块移回到海底深处(这些火山的最终喷发就是源于海底深处)时，旧地壳便被摧毁。

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Don't return to your place of work until your Fire Marshal gives the all-clear.

直到你的消防队给了所有的明确的工作，不要回到你的工作地点。

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Authorities blame the clashes on violent elements among the protesters that they say have fired grenades and guns at soldiers who were forced to return fire.

VOA: standard.2010.05.15

Police Commissioner Raymond Kelly told reporters Officer Levay was able to return fire, killing the unnamed gunman.

BBC: Three New York police officers shot and wounded

The man was hit in the left arm by one of the shots, but managed to return fire, killing Brown.

NPR: Financial Crises For Ga. Man Who Held Firefighters

According to the police, the deceased were wanted in a kidnapping case and the approaching SWAT team was shot at from inside the house, forcing the police to return fire.

CNN: Trials of Malaysia's Finest