Firstly, Mr. Davin C from the Likhan Science Center has introduced an experiment called "Boyle's Law --- Air Cannon" to the kids, which mainly utilized the theory of aerodynamics. When the air is compressed in an instant, it will form a powerful airflow and generate a strong impact.

Mr. Davin C then used a smoke machine to create a magic effect. He turned a discarded cardboard box into an air cannon that emitted white smoke and formed a magical air smoke ring. In this experiment, Mr. Davin C vividly explained to the students the principle of Boyle's Law: when there is more space, there is less pressure; when there is less space, there is more pressure.

首先，力翰科技馆的达文C老师向学生们介绍了一项名为“波义耳定律——空气大炮”的实验，这个实验利用了空气动力学的理论。当空气在瞬间被压缩后，就会形成强大的气流，并产生相应的冲击力。

随后，达文C老师利用烟雾机制造了魔术般的效果。他将一个废弃的纸箱变成了能喷出白烟的空气炮，并形成了神奇的空气烟圈。通过这个实验，达文C老师向同学们生动地解释了波义耳定律的原理：空间较大时，压力较小；空间较小时，压力较大。

The next experiment was the "Big Blower", in which Mr Davin. C interacted closely with the students. The children transformed into the "little scientists", actively joining in the experiment, listening to the explanations and engaging in the discussions.

During the experiment, we could see that the strong airflow could make people's faces become distorted, and make a big balloon suspended. In the laughter, the studentslearnt about Bernoulli's Principle: the air flows from high pressure to low pressure.

接下来是“大屁股吹风机”的实验，达文C老师与同学们进行了紧密的互动，孩子们化身为一个个“小小科学家”，积极参与实验，认真地听着老师的讲解，并进行了激烈的讨论。

实验中，强大的气流可以让人的脸部变得扭曲，也能使大气球悬浮在半空中。同学们在欢笑中懂得了伯努利原理：空气从高气压向低气压流动。

Lastly, Mr Davin C has focused on the "Carbon Dioxide --- Dry Ice" experiment. He invited the children to taste the dry ice soda to allow them to experience the special characteristics of dry ice.

At the same time, making good use of the material characteristics of the dry ice, Mr. Davin C have created an amazing dry ice smoke on the scene, giving every child a feeling as if they were in a magical dry ice smoke paradise, which was a perfect ending to the whole science open class.

最后，达文C老师将焦点放在了“二氧化碳——干冰世界”的实验上。他热情地邀请小朋友们品尝了干冰汽水的味道，让他们亲身感受到干冰的特殊性质。

同时，利用干冰的物质特性，达文C老师制造出了令人惊叹的现场干冰烟雾，让每个小朋友仿佛置身于神奇的干冰烟雾乐园，为整次科技公开课画上了完美的句号。