8月在英語中有時候也被稱為the dog days of summer,意思是夏天最熱的日子

Yes, you are correct. The term "the dog days of summer" is used in English to refer to the period of time in summer when the weather is at its hottest. This phrase is often used colloquially to describe the hottest days of the year, typically in July and August in the Northern Hemisphere.

The origin of this term is somewhat debated, but one theory suggests that it comes from the ancient Romans, who associated the hottest days of summer with the star Sirius, which is also known as the "Dog Star" because it is the brightest star in the constellation Canis Major (the Big Dog). Sirius rises and sets with the sun during this period, and the ancient Romans believed that its presence added to the heat of the sun.

In modern English, "the dog days of summer" is a colorful way to describe the hottest and often most uncomfortable days of the season.