🧩 词语组成解析
a. 氮的, 含氮的, 硝石的
🗣️ 情景例句
I don't know.
我也说不上来。
Have they developed a new method of transportation yet?
他们已经开发了新的运输方法了吗？
The deepest holes of all are made for oil, and they go down to as much as 25,000 feet.
在所有洞穴中，为寻找石油所钻的洞是最深的，这些洞可深达25，000英尺。