Isn't this what you often see in school scopes?! That kind of triangular wave.

Why do you find out now? I've done so many course design experiments, so I should have reacted immediately, huh? I'm a little annoyed.

As taught in the freshman course, by connecting the different ports of the pulse test box, it is possible to observe the different annual current waveforms created by various circuits on the oscilloscope. One of the most common is the triangular wave, which swings up and down like these steep slopes.

Although it is a bit far-fetched to put the triangle wave in tandem with the terrain here, I remember the bald professor who taught the principles of communication said that the triangle wave is characterized by a gradual increase in voltage and a sudden drop to zero, which is suitable for use in scanning circuits. The reason why it is suitable for scanning circuits is that the voltage is constantly rising and falling, so that all voltage values within the fixed range of the capsule can be realized in the timed period. In the same way, is the repeated triangular steep slope also so that all the heights within the range of the highest and lowest points of the slope can be achieved?

But why do you want to do that? Why do you need to check all the heights one by one?

Could it be ...... At this distance, there are different substances in different layers of air? Is it to allow people passing through to fully come into contact with these different substances, so that such a tunnel is deliberately designed by taking advantage of the sinking and floating characteristics of different substances in the air?

After all, in addition to expanding the contact area with the air, or blocking the direct exposure of the flashlight, and improving the concealability, this is the only reason that is more desirable. Could it be that it is specifically to drain the physical strength of the pursuers? …… But don't those who flee here need to expend a considerable amount of physical strength? What's the point......

However, it seems that flashlights were not so common in those days, right? Then the second conjecture can be ruled out. The first conjecture left was already far-fetched, and sure enough, this conjecture was more reliable, so there must be something hidden in the tunnel

――Maybe after knowing what these substances are, I can find out what Xiaomo is doing here.

I decided to go back to the tunnel and check it out. First of all, when I first entered the tunnel, everything around me was really normal, I carefully illuminated every corner with the flashlight in my hand, and I didn't find anything worth paying special attention to.

But as I approached the middle of the tunnel, I vaguely noticed that something seemed to be hanging upside down from the ceiling.

Could it be a bat?! I swallowed my saliva and carefully moved the light of the flashlight there, subconsciously preparing my feet to run away at any moment.

But the movie-like scene of a whole swarm of bats rushing towards me under the stimulus of light didn't happen. The things I mistook for bat wings in the dimness were actually leaves. And it's an upside-down blade.

- The top of this tunnel, starting from where I was standing at the moment, was covered with dragon boat flowers.

And it is a dragon boat flower with a more vivid color of flowers, which is almost blood red, and blooms in a bewitching way.

Don't...... This is what "Mom and Dad" are looking for, the dragon boat flower that exists as one of the real trial drug raw materials? But it does look like the breed is different from the one we grow...... Growing up in a place like this?! I happened to run into ......

So Xiaomo actually came to check on these dragon boat flowers? Then it can explain why Xiaomo came to this kind of tunnel where the terminal is a dead end.

Therefore, in fact, this kind of repeated steep slope is not because the air contains any special substances in a layered way, but to be more conducive to the growth of dragon boat flowers. Because the dragon boat flower is more suitable for high temperature and sunshine environment, it likes humidity and heat, and from what I just observed, the tunnel is not humid - not even moss grows on the walls. Although the dragon boat flower was cultivated by inverting the culture and using the seepage water from the tunnel roof, it still could not meet the conditions of sufficient sunlight.

It is estimated that the designer specially built this kind of tunnel with a subtle floor shape, in order to inject the light brought in from the well into the tunnel through the smooth ground through fixed-point reflection, and then through this special structure of the floor, the light reflected in stages is used to irrigate these dragon boat flowers, so as to meet their needs for light conditions, so that they can be so lush and prosperous, and bloom vigorously.

I couldn't help but marvel at the intricate design, and then I hesitated - what should I do with these flowers now? It's impossible to take them all away, but it doesn't make much sense to take two at random, right? The main thing is that there is no container to store them properly to ensure that the flowers will not be crushed.

After thinking about it, I decided to use the stupidest way possible-

I pulled out another plastic bag from the side of the backpack, jumped up from a relatively high place, picked a few dragon boat flowers back and forth several times, and put them into the plastic bag, and then carefully tied the plastic bag to the side of the backpack.

In this way, at least it can be "fresh" for a while, right? …… As for who it will give to when it is taken away, we will talk about it when the time comes.

Just as I was about to leave the tunnel like this, there seemed to be a faint sound of footsteps ahead. Could it be that Xiaomo is back again?! I hurriedly ran backwards, and when I was about to get out of the tunnel, I stopped and hid in some darkness - there was only the well and the bare walls outside the tunnel, and there was nowhere to hide.

Fortunately, when the footsteps came to the place where the dragon boat flower was, he stopped, and he began to know what he was busy with. I poked my head out of the ravine where I was hiding, but I was too far away to know who was doing something.

I knew I would have gotten closer, and I couldn't help but feel a little anxious.

Before I could finish my chagrin, the footsteps were gone. I hurriedly came out of the hiding place, ran to the dragon boat and looked up from below, but I still didn't know what the other party had just done here.

Forget it, it's better to go out and find Mom and Dad quickly. I quickly gave up, pulled my backpack and began to sprint out of the tunnel.

When I was about to go out, I was smart enough to lighten my pace and turn off the flashlight so as not to reveal my whereabouts like Xiaomo did before. It was only after my eyes had fully adjusted to the darkness that I began to struggle to discern the path ahead and grope my way slowly along.

It wasn't until I walked some distance out of that two-way entrance that I dared to turn on the flashlight again. In this way, I went all the way back to the original intersection of three choices, and I decisively chose the middle road this time.

But this time, I actually met an unexpected person.