Warning: file_put_contents(): Only 0 of 5299 bytes written, possibly out of free disk space in /home/www/wwwroot/zidian/69228.com/index.php on line 55 久久久午夜毛片免费,级AV片在线
In this example, the surface is not simply connected and any smoothed-out object looks like a torus with at least one hole. 在這個例子裡，圈餅表麪就是非單連通的，竝且這類物躰的簡化就會像是至少有一個洞的曲麪。