我说一个话题，大家帮我分析一下啊

<div align="left" style="font-family: tahoma, helvetica, simsun, sans-serif; list-style: none; margin: 0px="0px"  auto; padding: 0px; line-height: 21px; word-wrap: break-word; color: rgb(68, 68, 68); "><span style="font-family: 宋体; ">用重心来调节弧</span></div>

<div align="left" style="font-family: tahoma, helvetica, simsun, sans-serif; list-style: none; margin: 0px="0px"  auto; padding: 0px; line-height: 21px; word-wrap: break-word; color: rgb(68, 68, 68); "><span style="font-family: 宋体; ">压住来球并送出的</span></div>

<div align="left" style="font-family: tahoma, helvetica, simsun, sans-serif; list-style: none; margin: 0px="0px"  auto; padding: 0px; line-height: 21px; word-wrap: break-word; color: rgb(68, 68, 68); "><span style="font-family: 宋体; ">的重心控制有</span></div>

<div align="left" style="font-family: tahoma, helvetica, simsun, sans-serif; list-style: none; margin: 0px="0px"  auto; padding: 0px; line-height: 21px; word-wrap: break-word; color: rgb(68, 68, 68); "><font face="宋体" style="word-wrap: break-word; ">靠手臂</font><font face="Arial" style="word-wrap: break-word; ">,</font><font face="宋体" style="word-wrap: break-word; ">利用腿</font><font face="Arial" style="word-wrap: break-word; ">,</font><font face="宋体" style="word-wrap: break-word; ">腰</font></div>

<font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">分之一定律&nbsp;</font><font face="Arial" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">21</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">、拉加转</font>

<font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">的感觉</font><font face="Arial" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">!&nbsp;</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">和 很薄的撞！！！&nbsp;</font><font face="Arial" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">18</font>

<span style="color: rgb(68, 68, 68); font-family: tahoma, helvetica, simsun, sans-serif; line-height: 21px; ">1</span><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">、</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">根据旋转拉球&nbsp;</font><font face="Arial" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">16</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">、反手拨是</font>

<font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">用力方法是技巧</font>

<font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; "><font face="宋体" style="word-wrap: break-word; ">、击球时必须放松&nbsp;</font><font face="Arial" style="word-wrap: break-word; ">9</font></font>

<font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">为</font><font face="Arial" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">"</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">身前击球</font><font face="Arial" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">"</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; ">而做</font><font face="宋体" style="color: rgb(68, 68, 68); line-height: 21px; word-wrap: break-word; "><font face="宋体" style="word-wrap: break-word; ">拍&nbsp;</font><font face="Arial" style="word-wrap: break-word; ">6</font></font>