三角形个数的规律公式图片简介：This year, no common people dared to have a reunion dinner. There was no trace of joy on New Year's Eve and New Year. There were no red lanterns even at the door of wealthy families. Joy disappeared from the capital.
This year, no common people dared to have a reunion dinner. There was no trace of joy on New Year's Eve and New Year. There were no red lanterns even at the door of wealthy families. Joy disappeared from the capital.
