Rowland circle

例句：

1. 1. The Rowland circle is the largest and most complex in the park.
   罗伦圈是公园中最大的也是最复杂的。
2. 2. He was deeply influenced by the Rowland circle, which included many famous composers.
   他深受罗伦圈的影响，这个圈子汇集了许多著名的作曲家。
3. 3. The Rowland circle is a symbol of the community's unity and cooperation.
   罗伦圈是社区团结和合作的符号。