Nitrococcus
亚硝化菌
🗣️ 情景例句
African athletes are good at track and field events.
非洲选手擅长田径项目。
I was born in China and brought up in the U.S.A.
我出生在中国，在美国长大。
Yes, it helped me out a lot.
嗯，收获不少，