匀变速运动 比例关系:谁能给我解释解释以下代码，请一句一句的分析，谢谢了

body {font-family: Verdana;FONT-SIZE: 12px;MARGIN: 0;color: #000000;background: #ffffff; }
td {FONT-SIZE: 12px;}
textarea,input,object,SELECT {
font-size:12px;font-family:Sans Serif, Tahoma, Arial, Georgia, Courier, Times New Roman, Serif, Simsun;vertical-align:middle;padding:1px;color:black;background: #ffffff;border:1px solid #333333;margin:2px;
}
A:link {
COLOR: #666666; TEXT-DECORATION: none
}
A:active {
COLOR: #666666; TEXT-DECORATION: none
}
A:visited {
COLOR: #666666; TEXT-DECORATION: none
}
A:hover {
COLOR: #666666; TEXT-DECORATION: none
}
BODY {
BACKGROUND-POSITION: center top;
SCROLLBAR-FACE-COLOR: #006AAF;
FONT-WEIGHT: normal;
FONT-SIZE: 12px;
BACKGROUND-IMAGE: url(image/ck_lsky/bg.jpg);
SCROLLBAR-HIGHLIGHT-COLOR: #06A2C8;
SCROLLBAR-SHADOW-COLOR: #1CCAF7;
COLOR: #333333;
SCROLLBAR-3DLIGHT-COLOR: #1CCAF7;
SCROLLBAR-ARROW-COLOR: #1CCAF7;
SCROLLBAR-TRACK-COLOR: #1CCAF7;
BACKGROUND-REPEAT: repeat-x;
FONT-FAMILY: 宋体;
SCROLLBAR-DARKSHADOW-COLOR: #ffffff;
background-color: #ffffff;
}

.top { color:#003366;background: url(image/ck_lsky/top.gif);padding: 8px;}

form{margin:0px; display:inline}
div.quote{margin:5px 20px;border:1px solid $tablecolor;padding:5px;background:$forumcolorone;line-height : normal;}
a { TEXT-DECORATION: none;}
a:hover{ text-decoration: underline;}
img {border:0;}
.banner{color:#ffffff;background: url(image/ck_lsky/ck_top.gif)}
.imglogo {
MARGIN: 0px;
padding: 0px;
TEXT-ALIGN: center;
background-color:#11C7F7;
background-image:url(://bbs.lunqun.com/image/lunqun/logo.gif);
WIDTH: 295px;
HEIGHT:87px;
}
.banner a { color: #FFFFFF;}
.head { color:#666666;background: #FDFDFD;padding: 4px;}
.head a { color: #666666;}
.top { color:#666666;background: url($imgpath/$stylepath/top.gif);padding: 8px;}
.top a { color: #666666;}
.f_one {background: #FFFFFF;}
.f_two {background: #FFFFFF;}
.hr {border-top: 1px solid $tablecolor; border-bottom: 0; border-left: 0; border-right: 0; }
.t_one {background: #FFFFFF;}
.t_two {background: #FFFFFF;}
.r_one {background: #FFFFFF;}
.r_two {background: #FFFFFF;}
.cbg { color:#000000;background: url($imgpath/$stylepath/ck1.gif);}
.cbg a{ color:#000000;}
.ck1 { color:#000000;background: url($imgpath/$stylepath/ck1.gif);}
.ck2 { color:#000000;background: #C4F1FD;}
.smalltxt {font-family: Tahoma, Verdana; font-size: 12px;}
.tinytxt {font-family: Tahoma, Verdana; font-size: 11px;}
.cfont { color:#FFFFFF; }
.fnamecolor { color:#666666;}
.index_font{color: #666666;background: url($imgpath/$stylepath/bg.gif);font-weight:bold;padding: 5px;}
.tpc_title { font-size: 12px;font-weight:bold;}
.tpc_content { font-size: 13px;}
.i_table { background: #10C7F7; border:0.5px solid #10C7F7}
.i_table2 { background: #C4F1FD; border:0.5px solid #FFFFFF}
.tool {color:#666666;}
.menu{position:absolute;}