Hex math is weird. Since there are 6 directions instead of 4, there's no simple mapping between hex positions and 2D x,y coordinates. The naive approach is offset coordinates — numbering cells left-to-right, top-to-bottom like a regular grid. This works until you need to find neighbors, compute distances, or do anything involving directions. Then it gets confusing fast, with different formulas for odd and even rows.
在监测的339个地级及以上城市中，细颗粒物（PM2.5）年平均浓度28.0微克/立方米，比上年下降4.4%。
Slovakia to block EU loan to Ukraine if Orban loses Hungarian election, Fico says，推荐阅读新收录的资料获取更多信息
�@LINE���t�[�́u�����{���k�Ђ���15�N���}���鍡�A�w�킪�Ƃ̖h�ЃJ���e�x�����������ɐ������Ėh�Ђɂ��Ęb�������A���̐��тɍ������������m���A���̓I�ȍs���ɂȂ��Ăق����v�Ƃ��Ă����B���̑��A�֘A�������[�x���ł����uAI�ɂ����Ă݂悤�v�R�[�i�[�Ȃǂ��W�J�����B。新收录的资料对此有专业解读
See more at this issue and its corresponding pull request.
return err(f"all {max_retries} attempts to fetch {url} failed");。新收录的资料是该领域的重要参考