It is an allusion The poem uses Christian imagery regarding the Apocalypse and Second Coming allegorically to describe the atmosphere of post-war Europe.
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Folke Cronholm was secretly working for the Germans
Consent means for permission like if you wanted to go out you would want your parents consent
The second sentence, the author seems to be trying to inform or warn readers about extreme climate changes and then increasing .
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English is a language that started in Anglo-Saxon England. It is originally from Anglo-Frisian and Old Saxon dialects. English now has the status of a global language, because it is used worldwide. ... It is the most widely-spoken Germanic language, with at least 70% of Germanic speakers speaking English.