The demonstrators marched to Trafalgar Square where they held a rally.示威者游行到特拉法尔加广场举行群众集会。When they reached Trafalgar Square, the demonstrators were hemmed in by the police.当他们到达特拉法加广场时，示威者们已被警方包围起来了。Trafalgar Square is a favourite place for whooping it up on New Year's Eve.除夕之夜，人们爱去特拉法尔加广场狂欢作乐。