Pyrazinotropone
环庚并吡嗪酮
🗣️ 情景例句
The world could be heading for an economic recession.
世界也许正在走向经济衰退。
Why didn't you go?
为什么你不去？
What shocked him most was that the men who carried him were black.
最使他感到惊奇的是，把他运走的人都是黑人。