교환【交換】
обмен; коммутация; соединение абонентов
交換하다 обменивать; соединять
교환기【交換器】
коммутатор
교환학생【交換學生】
обмен студентами
"Life is far too important a thing ever to talk seriously about." Oscar Wilde
"Free speech carries with it some freedom to listen." Warren E. Burger
"Honor is not the exclusive property of any political party." Herbert Hoover
"Hitch your wagon to a star." Ralph Waldo Emerson