清明節的習俗是豐富有趣的，除了講究禁火、掃墓，還有踏青、蕩秋千、蹴鞠、打馬球、插柳等一系列風俗體育活動。相傳這是因為清明節要寒食禁火，為了防止寒食冷藏傷身，所以大家來參加一些體育活動，以鍛煉身體。因此，這個節日既有祭掃新墳生別死離得悲酸淚，又有踏青游玩的歡笑聲，是一個富有特色的節日。

四級翻譯參考答案：

Ching Ming Festival (the Tomb-sweeping Festival), the custom is full of interesting. In addition to pay attention to ban fire, tomb-sweeping, as well as spring outing, swinging, Cuju, playing polo, Liu inserted a series of custom sports. According to legend, this is because the Ching Ming Festival to Cold Food Observance ban fire, in order to prevent the Cold Food Observance buffet beverages, so we come to participate in some sports, in order to exercise. Therefore, this festival which has both the acid tears of sorrow for the died and the laughter from the players, is a distinctive holiday.