Sym-trioxane
[化] 对称三┭烷
🧩 词语组成解析
[计] 符号, 系统, 制
🗣️ 情景例句
Cheese--c-h-e-e-s-e.
Cheese c-h-e-e-s-e。
Think today and speak tomorrow.
三思而后行。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。