respect(宽容)
to maintain a relationship both need to respect eachother. for example mother and child, a mother always forgive her child,even he or she have done a big mistake. the same, being friends, we need to get to know eachother and forgivness,respect is the best way to keep relationship when growing up,as we`re knowing more about society and fact.eviroment changes day by day, friendship need to be changed by respect.