Wiserite
水镁锰矿
🗣️ 情景例句
the places they visit, and the landmarks.
他们所去的地方， 以及地标等等。
We can't recall how often he's written.
我们记不起来他每隔多久写一封信。
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。