Contemporary and practical scientific principle, the life that gives the mankind was brought handy with fun, and these result from science. Let me introduce one by one.
现代实用科学原理，给人类的生活带来了简便和乐趣，而这些都源于科学。让我来给你们一一介绍吧。
The bicycle generates electricity is the bicycle that makes a composition be auxiliary the sources of energy with accumulator, have 2 wheels, can realize manpower to ride travel, dynamoelectric or report aids the special type bicycle that uses a function. Do not waste each bits of resource so, very environmental protection. This is the internal composition that the bicycle generates electricity only, its appearance is none inferior also. It presents black all over, ahead has a screen, can show rate, horary travel you can follow …… of how many kilometre who rides friend game of travel fast, you ride of travel fast its grid can rise gradually, you ride of travel slow its grid can drop gradually.
Principle of the musical instrument that do not have bowstring is very simple, obscure with the hand a bundle of light, comparative batch touch a chord. Can play scale or music. There is some of material in nature, once illumination is shot, its in-house atom can release an electron, make the conductivity of the object increases.
自行车发电是以蓄电池作作文为辅助能源的自行车，具有2个车轮，能实现人力骑行、电动或电助动功能的特种自行车。这样不浪费每一点资源，又十分环保。这只是自行车发电的内部结构，它的外形也毫不逊色。它全身呈黑色，前方有1个屏幕，可以显示出速度，每小时行驶多少千米……你可以跟朋友比赛谁骑行的快，你骑行的快它的格子会逐渐上升，你骑行的慢它的格子会逐渐下降。
无弦琴原理十分简单，用手遮住一束光，就相当拨动一根弦。可以演奏音阶或乐曲。自然界中有些物质，一经光照射，其内部的原子就会释放出电子，使物体的导电性增强。
Invisible because human vision is wrong,the person's principle is, also used scientific principle: This item on display used flat looking glass to become become the vision that resembles disturbing an audience with flat looking glass like the principle, let outdoor audience cannot see the audience inside house and produce illusive ……
隐形人的原理是因为人类视觉错误，也利用了科学原理：该展品利用了平面镜成像原理用平面镜成像干扰观众的视觉，让屋外的观众看不到屋内的观众而产生错觉……
Science aroused my passion, excited, fancy, mysterious sentiment, I love science, if do not have science present we, if do not have science to do not have so good now life ……
科学激起了我的热爱、激动、新奇、不可思议的情绪，我爱科学，如果没有科学就没有现在的我们，如果没有科学就没有现在这么美好的生活……(文/赵冰冰)