今天，我们上了一节实验课，名字叫认识空气。
Today, we have an experimental class, named know air.
上课了，老师走上讲台，神秘地拿着一个塑料方便袋，问同学们：“同学们，看看我手里的塑料方便袋里有什么？”同学们异口同声地说：“什么也没有”。老师又拿着塑料方便袋抖动了几下，袋子立刻鼓了起来，老师又问同学们：“这回里面有什么？”同学们说：“是空气。”于是，老师在黑板上写下了四个大字“认识空气”。
Class, the teacher walked up to the podium, mysteriously holding a plastic convenience bag, asked students: "students, look at my hand in the plastic convenience bag what?" "There is nothing," the students said in unison. The teacher took the plastic convenience bag and shook it for several times. The bag immediately bulged. The teacher asked the students, "what's in it this time?" The students said, "it's the air." So the teacher wrote four big words "know the air" on the blackboard.
老师又让同学们分别在走廊、操场、教室里收集空气，老师问：“通过这些实验，你们能总结出什么？”我第一个举手发言，说：“空气无处不在。”老师满意地笑了，然后老师又让我们轻轻地将塑料方便袋打开，让我们闻一闻空气的味道。同学们齐声说：“没有味道。”老师又让同学们摸摸空气，同学们左抓右抓，什么也没有摸到。
The teacher asked the students to collect air in the corridor, playground and classroom. The teacher asked, "what can you conclude from these experiments?" I was the first to raise my hand and say, "air is everywhere." The teacher smiled with satisfaction, and then the teacher asked us to open the plastic convenience bag gently, so that we could smell the air. "No taste," the students said in unison The teacher asked the students to touch the air again. The students grasped the air from left to right, but they didn't touch anything.
通过这节实验课，我知道了空气是看不见，摸不着的东西，今后我要努力学习，掌握更多的知识，探索大自然的许多奥秘。
Through this experimental class, I know that air is invisible and touchable. In the future, I will study hard, master more knowledge and explore many mysteries of nature.
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