#cnblogs_post_body img {
    margin: 0 auto;
    margin-top:15px;
    display: block;
    height:35%;
    width:35%;
}
table {
margin: auto;
}

 /*溢出隐藏设置*/
 #topics, #mainContent {
     overflow: visible;
 }
 #postDesc {
     float: none;
 }