Undecylene
十一碳烯
🗣️ 情景例句
Merry Christmas, Carl and David!
卡尔，大卫，圣诞快乐！
The worst misfortunes are these that never hzppen.
最大的不幸是害怕不会发生的不幸。
I don't know! The address was on a piece of paper,but I can't find it now!
我不知道！地址在一张纸上，但现在找不着了！