If you ask for 4 summer essays, you must be original!!!!! Quick Quest Quick !!! Custom !! Original,

The navigation activity of an aircraft in the Earth's atmosphere is aviation. Balloons, airships use the buoyancy of the air to fly in the atmosphere, and airplanes use the aerodynamic force generated by interaction with the air to fly in the atmosphere. The engines on the aircraft work on the fuel (gasoline) carried by the aircraft and the oxygen in the atmosphere.

Aviation and aerospace is the most active and influential field of science and technology in the process of human understanding and transformation of nature in the 20th century, and it is also an important symbol of the high development of human civilization.

In the long years of conquering nature, human beings have long had the desire to soar into the sky and travel the universe. In an era when productivity and the level of science and technology are low, this desire can only stay at the stage of fantasy. Although humans have long explored and tried to fly, the realization of this wish began with the launch of a hot-air balloon in the 18th century.

It has only been since the first powered, maneuverable aircraft made a brief flight in the early 20th century, the age-old dream of humans to fly in the atmosphere has truly become a reality. Through the hard work of many outstanding figures, aviation science and technology have developed rapidly, and the performance of aircraft has been continuously improved.

Narcissism and flowers in conversation.

Dialogue with flowers, cleanse the soul, and understand life in the language of flowers.

Inscription. If there is really an afterlife, I am willing to be a psychic, proficient in the language of flowers, bamboo sounds, and open a dialogue ...... with flowers

Visit the peach - the face of the person does not know where to go, the peach blossom is still smiling in the spring breeze.

In the breeze and drizzle, I stopped and stopped at the smoke-like falling Yingying, and I stared at the tightly clasped firewood under the tree, and unconsciously asked: "Why can't I see the beautiful scenery of 'peach blossoms on human faces' again?" You smiled faintly in the spring breeze and sighed leisurely

The world is unpredictable, why didn't you cherish it at this time last year? Today's revisit, leaving a place of sadness, but to no avail. ”

I was stunned, it turns out that people have to learn to cherish.

Wanglian - can be seen from a distance and cannot be blasphemed.

Under the scorching sun, the fresh lotus flowers sang shyly in the clear waves, I stood on the shore, looked at the white lotus that appeared from time to time and asked: "Why do you always float in the uncertain water, why do you always reject people thousands of miles away?" You quietly brushed aside the green lotus leaves and replied with a gentle smile

Because I firmly believe that only clean water can keep me clean, and proper distance can teach people to respect, isn't it? ”

I was dumbfounded, it turns out that people have to learn to respect.

Ask Ju - who is hiding in the lonely standard and proud of the world? Is the same flowering as late at the bottom?

The autumn wind gusted, bringing autumn frost and knocking down a hundred flowers, I watched you quietly, my cold fingertips crossed the slender silk petals, and you looked up and smiled, as if you were born in spring and not in early autumn. I asked you with pity: "All the flowers bloom in spring, why were you born in this autumn wind?"

You raised your head proudly: "Life is cherished because it is different, I can laugh at the autumn wind and frost rain, why can't I live my personality?" ”

I was amazed that people have to live out their individuality.

Tanmei - scattered into mud and dust, only fragrant.

The winter snow fell, and the mud was pity-white, and Qiong Yao was cherished. But you are intoxicating in this wind, I look at the bright petals of the ground, puzzled when I was just about to ask, but you softly spoke: "I already know your words, how can the awe-inspiring north wind make me lose this pride."

I bloom in the ice and snow, in order to remember, to remember the days and nights of the year old, to let people remember, let life remember. ”

I silently really, it turns out that people have to learn to remember.

After a long time, I feel a lot, and I have gained countless things in life. For all this, cherishing can be exchanged for respect, and living proudly can be remembered by all things. In fact, the so-called psychic people are nothing more than synesthesia of all things in the world, perceive the subtle relationship between nature and human beings, wander in the realm of the unity of things and me, peep into the blue sky, dive into the yellow spring, wave the eight poles, and keep the spirit unchanged.