Nitrobacteria
n. 硝化细菌
🗣️ 情景例句
I'm not sure I'm up to it.
我不能肯定我是否能做得来。
During the two years since I took charge of the department.
在我负责这个部门的两年中。
Hello. Here's your eraser. Thanks very much!
给你橡皮。谢谢。