Diacetylene
联乙炔, 丁二炔
🗣️ 情景例句
It's a safe bet that he'll get the job.
他能得到那份工作，这几乎可以打保票。
Please tell him to stop speaking.
请告诉他不要讲话。
Are they under the chair?
他们在椅子下面吗？