7月11日标志着今年三伏天的开始,三伏天是中国夏天最热的日子。在中国农历里,三伏指的是那三个以十天为一个周期的时期,这些时期预计是一年当中最热的日子,这三伏分别是初伏(在7月中旬)、中伏(7月底至8月初)和末伏(8月中旬)。
No better way to cool off! Siberian tigers play in the pool of their enclosure to cool themselves in the zoo in NE China's Heilongjiang province on July 4, as the highest daytime temperature reaches 34 degrees Celsiu