<html>
<head>
<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>
</head>
<body>
<style>
font{
line-height: 1.5;
}
</style>
<div style = 'font-family:"微软雅黑"; font-size: 14px; color:#000000; line-height:1.5;'>
<div>
<div>Dear stefano,</div><div> Thank you so much for your explanation!</div><div> I understand now. And I found a good picture that demonstrate this particular issue.</div><div> here is the image link for whom confused with the same problem.<br> <a href="http://image.sciencenet.cn/album/201404/23/151523b496kcef1enlzaln.jpg" _src="http://image.sciencenet.cn/album/201404/23/151523b496kcef1enlzaln.jpg">http://image.sciencenet.cn/album/201404/23/151523b496kcef1enlzaln.jpg</a></div><div><br></div><div>best regards</div><div> </div><div> </div><div id="ntes-pcmail-signature" style="font-family:'微软雅黑'"><font style="padding: 0; margin:0;"> </font>
</div><br>
</div><style type="text/css">
a#ntes-pcmail-signature-default:hover {
text-decoration: underline;
color: #3593db;
cursor: pointer;
}
</style><!--😀-->
</div>
</body>
</html>