Nitrosomas
亚硝酸菌
🗣️ 情景例句
Your real education doesn't start until you get out into the real world.
直到你踏入现实社会，你才真正开始学习。
A wicked book is the wickeder because it cannot repent.
一本坏书危害无穷。
He waited until the volcano became quiet and he was able to return two days later.
他等到火山平静下来，两天以后又返回去。