Also in the third grade of primary school character book, I saw the knowledge of parachutes, I used to be a lot of times also want to understand the knowledge of parachutes, and then I actually saw it in such a primary school textbook, and when I saw such a paragraph, I found that in fact, the parachute is also a principle, the speed of the parachute descent is related to the size of the umbrella, the length of the rope, the weight of the heavy object hanging, the larger the umbrella, the slower the fall, the shorter the length of the rope, the slower the fall, the longer the rope length, the faster the fall, the lighter the weight of the hanging object descends slower, the heavier the heavy object falls, the faster the fall。

When I read such a paragraph, in fact, I also understood the law of parachutes, although it is very simple to say, but in real life, there must be enough design to create a qualified parachute, in order to be used at a critical time.

Parachutes have a wide range of uses, whether it is an ordinary aircraft or other military uses.

When we see the process of parachute descent on TV or other videos, some parachutes descend very quickly, and some parachutes descend very slowly, which is related to the design of the parachute, and some parachutes are still very inconvenient when they are opened.

But these are all daily necessities, I remember that I once took a plane, but also when I had to take a plane, the price of the plane and the price of the train are many times different, but when taking a plane, although the time is very short, in the same journey in a short time can reach the destination, but the process of taking a plane every time up and down will also make you feel thrilling, maybe to find a sense of excitement, I think many people take a plane for this kind of exciting feeling, and some people are for the convenience of doing business and pay attention to timeliness, so they take a plane, and when we took the plane, I found out that I took it once, and then I never took it again, because when I took the plane, on the one hand, the price was too expensive, on the other hand, it was really a thrilling feeling, and I also had a little psychological effect, at that time, I would inevitably have a little worry, in fact, it was still very safe to take the train, and it was the safest journey.

When I was on the plane, the last time I met a big sister who seemed to be very familiar with me, every time I always looked at the big sister, watched her every word and deed, every move, but after watching it, I found that she was really similar to someone I had seen, and I was always like this every time I kept looking at it, maybe in the end this big sister was embarrassed, covering her face with something, and when I found out, there was no way, so I had to give up like this, I stopped looking at people, and if I looked at it again, I couldn't see her face, and I couldn't see the familiar smile。

Maybe that aunt will think, this person is really weird, why is he staring at me all the time, why is he staring at me all the time?

But I just wanted to tell her that she really looked like a certain person I had seen, and I was also worried about a certain person's face, so I looked at the other person like this, and later realized that when she covered her face, maybe she really recognized the wrong person, so I just left it at that.

When I was on the plane, I saw that in fact, the white clouds seemed to be stepping on their feet, and this process was also very good, each time the high and low with the rise and fall of the plane, their heartbeat was also moving violently for no reason, as if there was a fixed rhythm and beat, but later I found that I still don't like such a thrilling feeling, or like to slowly reach a place, maybe it has something to do with my own economic situation, and I am not so anxious to go to a place, complete a thing, go to a familiar or unfamiliar place, but watch the scenery along the way。

When I saw some knowledge of the parachute, I didn't have this kind of knowledge before, although it was only the knowledge of elementary school, but I only learned this kind of knowledge when I was an adult, that is, in my 30s, but it was not too late, at least I had learned it, much better than I had never seen such knowledge, no matter when it was never too late.

And when I know such a knowledge, I also remembered some of my previous experience, that is, my first and only experience of taking a plane, until now, I also saved the plane ticket I took before the plane, I was reluctant to throw it away for a long time, maybe it is a kind of commemoration, I still took a plane to rush home when I was forced to get sick last time, maybe it was a kind of urgency of my own, but later, in many times, my husband also said that he wanted to take a plane, in fact, people are very curious, just want to try the feeling of taking a plane。

But after he said it many times, I still didn't want him to take a plane, such a feeling of flying was not at all pleasant, and I still hoped to be able to stay in one place quietly, save my money, and manage my life well.

People are like this, they always want to experience the feeling of things that they have not experienced, but sometimes they find that when you really experience it, it is actually very general and there is no difference between other feelings, what is the difference?

For example, one of my teachers told me that if you go to work, you can go by walking, you can go by bicycle, you can go by car, and you can go by motorcycle, there is no essential difference at all.

We take a plane is the same, just a way to travel, and sometimes we find that we still have to take a plane for a long distance, because in this way we can reduce the time of the journey, but also reduce their fatigue, after all, people's ability to bear is limited, take the train for more than ten hours, it is still possible, take the train for more than 20 hours is still acceptable, but when you take the train for thirty or forty hours, it is really sinful, and we also find that some people around us, they will also take the train for several hours to go to a certain place。

I sincerely worship these people, but even if I don't have money, I won't spend so much money and so much time to go to a place of my dreams, in fact, whether I am happy or not, happy or unhappy, has nothing to do with travel, the number of places to go, the key lies in my heart, this is the inspiration and inspiration I am getting now.