The chemical formula

化学式

Teacher: What is the chemical formula for water?

Pappu: HIJKLMNO!

Teacher: What are you talking about?

Pappu: Yesterday you said it's H to (2) O!

老师：水的化学式是什么？

帕普：HIJKLMNO！

老师：你说什么呢？

帕普：昨天您是说从H到O啊！

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