fn distance(x1: float, y1: float, x2: float, y2: float) - float {
[41]服务零售额是指企业（产业活动单位、个体户）以交易形式直接提供给个人和其他单位非生产、非经营用的服务价值总和，旨在反映服务提供方以货币形式销售的属于消费的服务价值，包括交通、住宿、餐饮、教育、卫生、体育、娱乐等领域服务活动的零售额。，详情可参考新收录的资料
"When I saw it in our studio when it was restored, I was immediately struck by the incredible power it has," Rijksmuseum director Taco Dibbits said.，详情可参考新收录的资料
The Northampton fly-half sat out training on Monday because of illness but England have been quick to allay fears that his participation against Italy is in doubt. Provided he recovers, Smith is expected to start at fly-half in place of George Ford.