刚收到亚马逊云账单，被扣了4.44刀，吓尿，麻溜的去查账单详情，发现之前弃用的美国实例有个弹性IP没释放掉，占着茅坑还不拉屎，被扣钱宝宝无话可说，赶紧释放。。。

$0.005 per Elastic IP address not attached to a running instance per hour (prorated)