Diacetylene
联乙炔, 丁二炔
🗣️ 情景例句
But I wear size ten.
但我穿十号的衣服。
I beg your pardon?
你说什么？
The Indian answered:No, madam. You don't understand! You're all after me! I'm the doctor!
“不，夫人。你不懂！你们所有的人都在我后面！我是医生！”