Years ago, I lived in a building in a large city. The building next door was only a few feet away from mine. There was a woman who lived there, whom I had never met, yet I could see her sit by her window each afternoon, sewing(针线活) or reading.
     After several months had gone by, I began to notice that her window was dirty. Everything was unclear through the dirty window. I would say to myself, "I wonder why that woman doesn't wash her window. It really looks terrible.”
     One bright morning I decided to clean my flat, including washing the window inside. Late in the afternoon when I finished the cleaning, I sat down by the window with a cup of coffee for a rest. What a surprise! Across the way, the woman sitting by her window was seen clearly. Her window was clean! Then it dawned on me. I had been criticizing(批评) her dirty window, but all the time I was watching hers through(通过) my own dirty window.
     That was quite an important lesson for me. How often had I looked at and criticized others through the dirty window of my heart, through my own mistakes?
     Since then, whenever I wanted to judge (评判) someone, I asked myself first, "Am I looking at him through my own dirty window?”
Then I try to clean the window of my own world so that I may see the world about me more clearly.

    When you watch 3D movies or TV, you have to wear a special pair of glasses. The 3D glasses make the images from the screen look like they are there in the room with you.

    Three-dimensional, or 3D, means having three dimensions（维度）: width, height and depth. 3D technology（技术） is based on the way the human brain（大脑） and eyes work. Because the pupils of a person's eyes are about 6.5era apart（分开）, when we look at something, each eye sees,it from a different angle（角度）. Our eyes send the two images to our brain, and the brain puts them together. The small difference between the image from the right eye and the image from the left eye allows us to see depth.

    When we view pictures and television in two dimensions, each eye gets the same information. That is because the image has no real depth, and there is only one of viewing it. So the goal of 3D technology is to get a different image into each of the viewer. It uses two film projectors. One projects a left eye image and the other projects a right image. The 3D glasses allow us to see a different image in each eye.

    While watching 3D films, we feel that we are in the same environment as the things we're watching. However, it also has its disadvantages. The 3D glasseswork by controlling the amount of light that reaches the eyes. It makes the screen look darker. What's more, people with eye problems may get headaches if they spend too much time watching 3D movies，because their brains need to work harder to "read" the images.

    Once when I was a teenager, my father and I were standing in line to buy tickets for the circus.

    Finally, there was only one family between the ticket office and us. This family made a big impression on me.

    There were eight children, all probably under the age of 12. You could tell they didn't have a lot of money. Their clothes were not expensive, but they were clean. The children talked excitedly about the clowns. It was clearly a very important day out for them. The father and mother seemed happy as they could be.

    The tickets lady asked how many tickets the father wanted, he proudly answered, "Please let me buy eight children's tickets and two adults' tickets, so I can take my family to the circus."

    The ticket lady told him the price.

    The man's wife lowered her head. There was no longer a smile on the man's face. He quietly asked, "How much did you say?"

    The ticket lady again told him the price.

    The man obviously didn't have enough money. But how could he tell his kids the bad news?

    Seeing what was happening, my dad took a $20 note from his pocket and dropped in on the ground. (We were not rich ourselves at all!) He then tapped the man on the shoulder and said,

    "Excuse me, Sir, you dropped this."

    The man understood my father was helping him. He picked up the money, looked straight into my dad's eyes, and in tears replied, "Thank you. This really means a lot to me and my family."

    Although we did not go to the circus that night, we didn't go without.

    A young queen was given a magic box by a wizard (男巫). The box would bring happiness to the whole country whenever it was opened in a place full of the spirit of generosity (慷慨).

    The queen traveled all over the country, looking for the most generous people. If she collected them all, she would open the magic box. The queen felt disappointed because nothing special happened.

    One day when the queen decided to return to her palace, she saw a poor little boy begging. She would like to give the boy some money, but she didn't have any with her. So the boy asked her if she could give him the old box. Then he could sell it for a little money. At first the queen hesitated (犹豫), because she had been told the box had magical powers. But seeing how poor the boy was, she gave it to him. The boy took the box and opened it.

    Immediately, all the most wonderful things one could imagine started flying out of the box and a voice said, "Why look for it in others? Goodness always starts in yourself. "

    While enjoying all the wonders of the magic box, the queen learned to set an example to others, and she became the best queen ever in history.