H2
[医] 氘(音刀), 重氢
🗣️ 情景例句
What are you looking for in your next job?
你希望在你的下一份工作内得到什么？
He that would eat the fruit must climb the tree.
不劳无获。
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。