В чем разница между in turn и in return ?Пожалуйста, приведите примеры.

The difference is subtle. The phrase "in return" implies someone is receiving something beneficial. (I will wash your dishes and in return, will you do my laundry?) The phrase "in turn" talks more about consequences or the sequence of events in time, and can often have a similar meaning to the word "eventually". They are possibly interchangeable in these sentences, but they are not always interchangeable. Both of these phrases are somewhat formal, and are much more common in writing than in speech.