Nitrosification
亚硝化作用
🗣️ 情景例句
We've always lived in this area.
我们一直住在这个地区。
We are short of hands now.
我们现在人手不足。
When you think of the innumerable birds that one sees flying bout,
你可以想象出天上有看得见的飞来飞去、数不清的鸟，