1. Does this "elude" mean "avoid" or "don't understand"?
2. At first, I couldn't understand what actually happened in "she talked and talked", but finally realized "Raisa Gorbachev chimed in many times", right?

ex)Even between equally talkative cultures, there are differences in conversational style. In American society, we tend to believe that, even in casual converation, only one person should speak at a time. Yet in many other countries, it is normal for a listener to chime in when someone is talking in order to show enthusiastic participation or involvement with others. Such logoc seems to elude many in the Unites States.
In the late 1980s, the U.S. president's wife, Nany Reagan, complained to the press about Raisa Gorbachev, wife of the Soviet president : "From the moment we met, she talked and talked - so much that I could barely get a word in."
Probably unaware of the "one speaker at a time" ethic, Mrs. Gorbarche might have been wondering why her U.S. counterpart never said anything - and made her do all the conversational work.