Phosphonoacetone
二氧磷基丙酮
🗣️ 情景例句
Is not prepared for interview.
对面试无准备。
A middle course is the safest.
中庸之道最保险。
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。