Diazodinitrophenol
重氮二硝基苯酚
🗣️ 情景例句
We have done so much
我们已做了这么多的事
How awful.
多可怕呀！
Early next morning, she heard planes passing overhead and wondered how she could send a signal.
第二天一大早，她听到头顶上有飞机飞过，但不知道怎样才能发个信号。