It was, according to royal officials, a personal decision, but King Juan Carlos's surprise announcement that he will abdicate in favor of this son comes after a difficult few years for the king. His youngest daughter has been implicated in a major corruption investigation, _________________________________ Meanwhile, thousands of anti-monarchist demonstrators have gathered in Madrid to call for a referendum on whether Spain should become a Republic. There are similar peaceful rallies in other Spanish cities. The BBC's correspondent in Madrid says republicanism is a potent mainstream force in Spain and the monarchy has seen a decline in popularity. 国王胡安`卡洛斯令人惊讶的宣布他将退位,让位给其子,根据皇家官方解释,这是一个个人决定.但此番决定是在他经历了数年艰难岁月后做出的.他的小女儿卷入了一起重大腐败案的调查,______________________________ 同时,数千名反对君主制的游行示威者聚集在马德里要求进行公投,以决定西班牙是否应变为共和国.在西班牙其他城市也有类似的和平集会.BBC在马德里的记者说共和制是西班牙的主流力量,而君主制在群众心中正在衰落.