Pyrotol
临氢脱烷基(法)
🗣️ 情景例句
I believe my English fluency is quite good.
我认为自己的英语相当的流利。
Thank you for your gift.
谢谢你的礼物。
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。