the footsteps of the world expo is getting closer and closer to us, civilized and harmonious call is still ringing in my ears. shanghai, china obtained the right to host the world expo , expo shanghai china will be a world event, the development of shanghai's new round of golden opportunity, as it is an important embodiment of our national spirit.
world expo is a great influence and a long history of international activities, is the largest gathering of human beings. people from around the world gathered in one place display their roducts and skills, boast of their hometown and motherland. expo set the culmination of human civilization, which has a unique appeal, make you feel surging.
world expo is a platform, we are the masters. she put up alatfom rfor us to let the world know us; she built a bridge for us, so we better communicate with the world. this platform may let us display self wantonly. we are the masters here, we have to landlord, let guest experience enthusiasm and happiness.
everyone to contribute for the expo, we are no exception, as a living piece of fertile land in pudong's teachers, we are proud and pride. in the vision of a better tomorrow, we have to do for the world expo will own a wonderful ability, we have through our hands, warm heart and sincerity to practicalaction to achieve the commitment of shanghai to the world.
we should educate the many students: do not throw garbage anywhere, no spitting, no jaywalking ... ..., hello, thank you frequently mention, let the material on this city with the new york comparable to the spiritual civilization.
educate our students to exciting , willing tohanghai's future by copies of power, if only planted a small tree, participants in the shanghai world expo foreign guests feel: this is a forest city, pollution-free city, ancient and civilized city. better city, better life! until the time of the expo, then, we want to become a glorious volunteers, to changing our foreign friends in shanghai and china's long history, aout our education for the world expo will contribute their efforts.
we expect the majority of teachers will be great enthusiasm for the world expo into practical action to meet the world expo, the expo will be a total growth, and the city of development, the development of shanghai devote their efforts to advance hand in hand with shanghai.
good evening ，ladies and gentlemen:
thank you very much for choosing to e in such a cold night。today my topic is about choice and process。a research shows that a man has to make 73 choices one day。with so many choices one day， people easily get so confused and afraid of making wrong choice that they hesitate and finally miss the true part of life。 in my opinion， the following part is of much more importance than the choice。 there is no absolute right or wrong choice but wonderful or boring life， which the process makes the difference。 life is a box of chocolate，you never know what you will get。
forrest gump made no decision by and for himself but he acplished great success with his strong will in the process。 the process is not the road itself but the attitudes and feelings ，the caution， courage and persistance we have as we encounter new experience and unexpected obstacles。 take myself as an example， i changed my major when i became a postgraduate。 after the choice，days have been harsh for me。i cannot understand the new lessons at all。
for they are closely related to mathmatics which i learned nothing about before。 however wuth the belief that this is the great chance for me to experience new ideas and challenge myself，i persisted。
i asked for help from every channel and reorgonized my life。 gradually i could understand some parts and even found maths interesting。moreover，
i learned to act instead of plaining。 in retrospect，the choice left no trace in my mind but the happiness and bitterness of the past four months bees an unforgetable experience in my life。 no matter what the choice is， enjoy the process。 in the process， your potential will be inspired and new discoveries，improvement and progress will e to you。
these are the most beautiful sceneries and only on the way can you see it。these make your life colorful。
there is no need and i donnot want to judge whether it right or wrong for me to be here，but i congratulate to myself for i gain and enjoy this fantastic experience。 so my dear friends，never worry about your choice and enjoy the process。 i am sure you will get something new and intersting tonight after you chose to e here。 thank you!
i have the answer to a question that we've all asked. the question is, why is it that the letter x represents the unknown? now i know we learned that in math class, but now it's everywhere in the culture -- the x prize, the x-files, project x, tedx. where'd that come from?
about six years ago i decided that i would learn arabic, which turns out to be a supremely logical language. to write a word or a phrase or a sentence in arabic is like crafting an equation, because every part is extremely precise and carries a lot of information. that's one of the reasons so much of what we've come to think of as western science and mathematics and engineering was really worked out in the first few centuries of the common era by the persians and the arabs and the turks.
this includes the little system in arabic called al-jebra. and al-jebr roughly translates to “the system for reconciling disparate parts.“ al-jebr finally came into english as algebra. one example among many.
the arabic texts containing this mathematical wisdom finally made their way to europe -- which is to say spain -- in the 11th and 12th centuries. and when they arrived there was tremendous interest in translating this wisdom into a european language.
but there were problems. one problem is there are some sounds in arabic that just don't make it through a european voice box without lots of practice. trust me on that one. also, those very sounds tend not to be represented by the characters that are available in european languages.
here's one of the culprits. this is the letter sheen, and it makes the sound we think of as sh -- “sh.“ it's also the very first letter of the word shalan, which means “something“ just like the the english word “something“ -- some undefined, unknown thing.
now in arabic, we can make this definite by adding the definite article “al.“ so this is al-shalan -- the unknown thing. and this is a word that appears throughout early mathematics, such as this 10th century derivation of proofs.