Viferral
吡啶与三氯甲醛聚合物
🗣️ 情景例句
Thank you very much. So we can put our minds at ease.
非常感谢，这样我们就放心了。
Every Jack has his Jill.
有情人终成眷属。
I have some difficulty in pronouncing some of the words in English.
我有些英语单词发音不好。