Fluchloralin
氟消草
🗣️ 情景例句
Dear Allen.
亲爱的爱伦。
This problem is hard to solve.
要解决这个问题不简单。
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。