Diacetylene
联乙炔, 丁二炔
🗣️ 情景例句
Just let me see the score, Ellen.
让我去看看比数 Ellen。
Have you ever thought about becoming a professional musician?
你曾经考虑了成为一个职业的音乐家吗？
I'm afraid that I can't.
恐怕不行。