爷爷奶奶 / 过分 / 溺爱 / 孙子 / 让 / 他 / 养成 / 了 / 许多 / 坏习惯爷爷奶奶过分溺爱孙子,让他养成了许多坏习惯。The grandparents spoil their grandson excessively, which has developed many bad habits in him.