Tautomerizing
互变现象
🗣️ 情景例句
Mmm-hmm. Thanks.
嗯。谢谢。
May I pay by credit card?
我可以用信用卡付款吗？
While the men had been working inside the ship, the air-line had been giving off oxygen.
当工人们的在船舱里干活时，供气管一直在排放氧气。