Spherical symmetry
[计] 球对称
🧩 词语组成解析
🗣️ 情景例句
Are you sure you know where you're going?
你真认识你要去的地方吗？
How long will you remain there?
你将会在那里逗留多久？
In 1929, three years after his flight over the North Pole, the American explorer, R.E.Byrd, successfully flew over the South Pole for the first time.
美国探险家 R。伯德在飞越北极3年之后，于1929年第一次飞越了南极。