Aquogel
[机] 水凝胶
🗣️ 情景例句
His wife just found out about his mistress.
他的妻子刚刚发现了他有外遇。
No, I don't. Will it be a problem?
不，我没有，会有困难吗？
What happened before printing was invented?
印刷术发明以前是怎么一回事？