at the most advanced position in a field
на самой передовой позиции в области (na samoy peredovoy pozitsii v oblasti)
"The lab is at the cutting edge of medical research."
"Лаборатория находится на переднем крае медицинских исследований." (laboratoriya nakhoditsya **na perednem krae** meditsinskikh issledovaniy)
someone suddenly understands something
to expect or plan for something
to delay making a final decision so you have choices
to be very close friends
thinking about something without giving it full attention
to be promoted to higher positions over time
