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- The main goal of this paper is to study the density of the two circle packing, in particular, the relevant density problems of the set of incir-cles of the Archimedean tessellation (12, 12, 3). 利用欧式空间中正多边形的(12，12，3)阿基米德铺砌，借助一个新函数t_s，通过对t_s的计算及一系列的证明，我们得到如下结果：
- She only unbends in the family circle. 她只在家庭环境里才不拘束。
- Let's pack up and spend a week in the countryside. 咱们收拾好东西到乡下去过一个星期吧。
- Phillip is packing up his goods. 菲利普正包装他的货物。
- The children formed a circle round her. 孩子们在她周围围成了一个圈。
- We've booked seats in the circle. 我们预订了楼厅包厢的座位。
- How would you pack the goods we have ordered? 我们订购的这批货，不知你们是怎么包装的？
- He used to smoke a pack of cigarette a day. 他过去经常一天抽一包香烟。
- He has a large circle of friends. 他有一大群朋友。
- We leave tomorrow but I haven't begun to pack yet! 我们明天动身，但我现在还没开始收拾行李呢！
- She moves in a very small circle. 她的活动圈子很小。
- The ship was nosing a way through the ice pack. 轮船小心地通过大块浮冰。
- Our packing method shall be improved. 我们的包装方法应加以改进。
- Don't forget to pack your toothbrush! 别忘了把牙刷放到箱子里去！
- He has a wide circle of acquaintances. 他交游甚广。
- A planar region bounded by a circle. 圆形区，圆形空间被圆所包围的一个平面区域
- I'll be packing up my thing then. 那时候我在收拾行李。
- A square has four sides but a circle has no sides. 正方形有四条边，而圆形没有边。
- Sorry, exercise circle is sold out. 对不起，健身圈卖完了。
- They went hunting with a pack of hounds. 他们带一群猎狗去打猎。
