Dog Days

"Dog Days" are the hottest, most sultry days of summer. In the northern hemisphere, they usually fall between early July and early September. In the southern hemisphere they are usually between January and early March. The actual dates vary greatly from region to region, depending on latitude and climate. 

The name comes from the ancient belief that Sirius, also called the Dog Star, in close proximity to the sun was responsible for the hot weather.

 

这个词其实与“狗”没有任何关系,而是指夏天中最热、最闷的那些天。如果 在地球的北半部,大概就是指在七月初到九月初期间;在南半球,一般是在一月和三月初之间。确切的日子随着地区不同而不尽相同,主要是根据纬度和气候的缘故。在中国,这个词就可以翻译为“大伏天”了。

这个名词是来源于古代人名以为狗星,又称为天狼星,与太阳很亲近,天气热与这个狗星有关,意思是“狗星的日子”。