Oxidoreduction
氧化还原
🗣️ 情景例句
Is smoking allowed on the train?
火车上允许吸烟吗？
It was eleven o'clock when he finally showed up.
他最后露面时，已经11点钟了。
By this time, however, three men had come into the ring and they quickly dragged the drunk to safety.
好像连牛也在为他感到遗憾，