The Central Idea of Zhu Yong 'an's "Wonderful Popular Science Speech"

Dr Arnold, a famous American orator, gave what is considered to be the most wonderful popular science lecture in America today. Arnold has always attached importance to popular science propaganda. He thinks that the significance of a successful popular science speech is no less than a valuable invention.

Arnold thinks that he is both a scientist and an orator, and it is incumbent on him to explore this aspect. So he "black powder debut."

Arnold stepped onto the platform with a smile on his face. He first made a realistic slide on the curtain, showing a strange and interesting photo.

A monster that people have never seen before suddenly appeared on the curtain: its big round head is covered with sharp and thick "hair", its cheeks, chin, neck and even nose are covered with strange beards, and its eyebrows stand upright like sticks. Although "glaring" and "showing teeth", it looks ridiculous.

Just as people were very curious and surprised, Arnold said, "Who knows what this guy is?"

This question immediately aroused the strong interest of some people in the place. Some listeners shouted: "I know, this is a newly discovered monitor lizard!" " "However, someone immediately objected:" No! I dare say that what is still alive today is a strange dinosaur! " "all right! It is the Bigfoot monster that American legends have not found for many years! "Someone said loudly and confidently." No, no, it's all wrong It is a newly discovered' alien'! "

Opinions vary, and no one can agree. Everyone thinks he is right, and no one can convince anyone. The venue was full of excitement.

"Please note that it is under your feet!" While the iron was hot, the speaker raised his voice.

As soon as this was said, the venue immediately "exploded the pot"!

Some women screamed on the spot. There are also some timid people who simply jump up from their chairs and turn around and run. Some people are very calm, but they don't understand at the moment, and even suspect that their ears are wrong. More people bent down and looked at the ground. However, they all looked at each other, puzzled: there was nothing under their feet.

"To tell you the truth, this is a little black ant in California. Everyone knows that they are everywhere and can be seen at any time. There may even be hundreds in this room! " Arnold said.

I see, and everyone can't help but breathe a sigh of relief. However, people's interest has come again: such a "tiny" bug can't be seen without crouching down. Why did it become a "monster" in the photo?

"This is what we took with the latest ultra-high magnification camera!" The speaker lost no time in explaining.

However, before people's emotions completely relaxed, he added, "But our real purpose is not to shoot this gadget. Look at the little thing next to its face. What is this? Interested parties may wish to guess again. "

People are in high spirits and express their opinions.

"It's actually a gear!" Dr Arnold's voice is louder.

People are surprised and puzzled: "Is there really such a small gear?"

"Its diameter is only 30 microns! In other words, one of your hairs is many times thicker than it! " The speaker's tone has also improved.

Someone in the audience asked, "What's the use of such a small thing?"

"Is this a kind of handicraft with only ornamental value, like China's micro-sculpture, such as carving a Tang poem on a hair?"

……

"Excuse me, does anyone here have high blood fat and cholesterol?" The speaker's temper changed and his tone was much calmer.

Do you have to ask? In the United States and even the world, the incidence of cardiovascular diseases such as hypertension and coronary heart disease is increasing year by year. At present, they have become the "first killer" in Europe and America. Most of their causes are directly related to the high content of fat and cholesterol.

"We are going to make this device into a small robot. After they enter the patient's blood vessels, they can constantly identify and destroy blood lipids and cholesterol, making them a kind of garbage that can be removed by blood vessels. In other words, these little robots will become the most diligent and effective scavengers in your blood vessels! "

The meeting room immediately burst into warm applause.