Bicyclic hydrocarbon
[机] 二环烃
🧩 词语组成解析
a. 两个轮子的, 二环的, 两圈的\\n[机] 二环的
🗣️ 情景例句
Is this your very first advanced aerobics class?
这是你第一次上有氧运动高级班吗？
No need to discuss!
免谈！
We were getting very worried.
我们都非常担心呢。