Benz(c)indeno(2,1-a)fluorene
[化] 苯并[c]茚[2,1-a]┑
🗣️ 情景例句
The advanced class is nonstop.
高级课程， 是没有休息的。
Your price is 20% higher than that of last year.
你方价格比去年高出20%。
Mars is too dry and poor in oxygen, Venus far too hot, and so is Mercury,
火星太干燥又缺氧，金星太热，水星也一样。