Dialkene
二烯烃
🗣️ 情景例句
Yes, we are, Mr. Wang. How are you going to pay?
对，我们开门。你打算如何付钱？
You'll be on air in two minutes.
两分钟以后你会上电视。
By having to sleep in the open, he gets far closer to the world of nature than most of us ever do.
由于被迫在露天睡觉，他比我们中许多人都离大自然近得多。