Cyclohexyl
[建] 环己基
🗣️ 情景例句
Bye.
再见。
Is meat packing a big industry in your country?
肉制品包装在你的国家是大产业吗？
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。