1. There is a post-midnight charge in London and Singapore, which explains why Singaporean taxis disappear after 11:30 PM and reappear at midnight.
    在伦敦和新加坡还有种午夜后收费，这就是为什么新加坡的出租车在晚上11: 30后就消失，直到半夜后才又出现的原因。