Nitrococcus
亚硝化菌
🗣️ 情景例句
You really ought to take some time off.
的确应该休一休假。
Sorry, it's broken. You have to use the stairs.
对不起，它坏了，你只能走楼梯了。
It's very kind of you to call.
谢谢你来告诉我。