Denitrifier
[医] 脱氮菌
🗣️ 情景例句
He is making good progress after his operation.
他动过手术后病情大为好转。
One who can do everything can do nothing.
什么都能做，什么都不行。
Come up these steps with me, please, and be careful.
请跟我走上这些台阶，请小心点。