<div><br clear="all">hello ,everyone:</div>
<div>my calculation cost much time,so i want to go on the calculation at the stop .</div>
<div>but i do not know whether it can achieve the aim and how to deal with it</div>
<div>i need your help.</div>
<div>thanks a lot <br>-- <br>Xu Yuehua<br>physics Department of Nanjing university<br>China </div>