BBC News with Neil Nunes. King Juan Carlos who helped secure Spain's transition from dictatorship to democracy is abdicating after nearly 40 years on the throne. In a televised address, he said that when he turned to 76 in January, he decided the moment was right to pass on the role to his son Crown Prince Felipe.__________________________________________ Tom Burridge reports from the capital Madrid. BBC新闻,尼尔`纽斯报道.曾经帮助西班牙从独裁制度过渡到民主制的胡安`卡洛斯一世在执政近40年后决定退位.在一个电视讲话中,他表示会在一月份,自己76岁时将皇位传给儿子费利佩王储了._________________________________________汤姆`伯里奇从首都马德里发回报道.