Nitrococcus
亚硝化菌
🗣️ 情景例句
His studies haven't been inproving lately.
他的学业最近没什么进步。
Would you please have these clothes washed for me?
可以请你为我把这些衣服洗了？
I can see a sweater.
我看见了一件羊毛衫。