Dialkene
二烯烃
🗣️ 情景例句
So just relax.
所以 ，放轻松点。
The doctor said it's just a mosquito bite, There's nothing to worry about.
医生说只是被蚊子咬了一口，不需要担心。
Imagine their dismay when they found a beautifully-cooked wallet and notes turned to ash!
可以想像他们发现一只煮得很好看的钱包，钞票已化成灰时的沮丧心情。