I'm not a native speaker, but I think 'in turn' means 'a counteraction following the action' Just my 2 cents:-) Here's what I found from Collins Cobuild. 33 turn You use in turn to refer to actions or events that are in a sequence one after the other, for example because one causes the other . One of the members of the surgical team leaked the story to a fellow physician who, in turn, confided in a reporter.
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Grammar GeekMiss Smith was tearful on her last day of teaching. John raised his hand to say how much he had enjoyed having her as his teacher. Each student, in turn, shared a memory of how she had helped them and to say how much they would miss her.