Hello,everyone! Today, the topic of my speech is "a word that has changed the world', In my opinion,if a word should be chose that has changed the world, I think it is "accidently". Because many important events happened by accident in history. For exampe, Newton was hit by an apple accidently, which led him to discover universal gravitation; Watt was absorbed accidently by steam when the water was boiling, which resulted in the improvement of steam locomotive and then the industrial revolution; Due to Hieler's accidently escape from dangers many times, the world war two broke out, etc. So, I think the word "accidently" has changed the world. I believe that in the later times, the word "accidently" will keep cahnging the world, forever. Hello,everyone! Today, the topic of my speech is "a word that has changed the world', In my opinion,if a word should be chose that has changed the world, I think it is "accidently". Because many important events happened by accident in history. For exampe, Newton was hit by an apple accidently, which led him to discover universal gravitation; Watt was absorbed accidently by steam when the water was boiling, which resulted in the improvement of steam locomotive and then the industrial revolution; Due to Hieler's accidently escape from dangers many times, the world war two broke out, etc. So, I think the word "accidently" has changed the world. I believe that in the later times, the word "accidently" will keep cahnging the world, forever.