20200703 卡拉哈里沙漠中的南非狐 必应壁纸
南非狐 卡拉哈里沙漠中的南非狐 天气转暖，日子更长了，这只能说明一件事-夏天的狗日已经到了。这些海角狐狸通过在卡拉哈里沙漠嬉戏来庆祝我们的狗日。它们可能不是您通常想到的那种“狗”，但是海角狐狸与您所认识和喜爱的狗来自同一个家庭（犬科）。海角狐狸在黎明前或黄昏之后最活跃，部分是为了逃避它偏爱的沙漠灌丛中的热量，通常在清晨和傍晚发现。如果您想知道“夏天的狗日”是如何产生的，请仰望天空。在北半球的夏季，夏至前后，名为小天狼星的恒星在冬季缺席后返回夜空。天狼星是天狼星，因为它是犬大星座的一部分，因此被誉为“狗星”，是迄今为止夜空中最亮的星。每年的这个时候，在日出之前的片刻之内，它又在东部地平线之上再次可见。
英语原文:
The weather is warmer, and the days are longer, which can only mean one thing—the dog days of summer have arrived. These Cape foxes are helping us celebrate the dog days with their frolicking in the Kalahari Desert. They may not be the kind of 'dogs' you typically think of, but Cape foxes are from the same family (Canidae) as the pooches you know and love. Partly to escape the heat in the desert scrubland it prefers, the Cape fox is most active just before dawn or after dusk, commonly spotted during the early mornings and early evenings.If you're wondering how the phrase 'dog days of summer' came about, look to the sky. In summertime in the Northern Hemisphere, around the time of the summer solstice, the star called Sirius makes its return to the night sky after having been absent during winter. Better known as the Dog Star, because it's part of the Canis Major constellation, Sirius is by far the brightest star in the night sky. This time of year, it becomes visible again above the eastern horizon for a moment just before sunrise.
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