The knowledge that come is gotten on this book, it is not quite perfect after all. If want to understand among them reason deep, must want to carry out ability travel personally. This, it is Liu You is in " wintry night reads show child Yu " in what teach us.
这书本上得来的知识，毕竟是不够完善的。如果想要深入理解其中的道理，必须要亲自实践才行。这，是陆游在《冬夜读书示子聿》中所教育我们的。
In the closest physics study, I am encountered constantly measure quality, volume kind problem. Doing over and over, not tire of its are irritated. When the exercise, the regular meeting when me thinks: In the life, how many opportunity uses these knowledge? However, be in today make cake for father when, with respect to “ practice gives genuine knowledge ” , carry real operation, learned a lot of physics knowledge from inside the life.
最近的物理学习中，我时常遇到测量质量、体积类的题型。一遍又一遍地做着，不厌其烦。在练习时，我时常会想：在生活中，有多少机会运用这些知识呢？然而，今天在为爸爸制作蛋糕之时，就“实践出真知”，通过实际操作，从生活中学习到了许多物理知识。
The cake that make, relatively for a few common occurrence at other, the material of need is careful all the more. Though not certain just right, but should differ at least very few, do otherwise will be make a person difficult together the thing of the following pharynx. But the measuring glass in the home is an unit with “ milliliter ” , want to get the goods that overcomes ” to how many “ , be about to use learns density knowledge.
制作蛋糕，相较于其它的一些家常便饭来说，需要的材料格外精细。虽说不一定分毫不差，但至少要相差无几，否则做出来的将会是一块令人难以下咽的东西。可是家中的量杯是以“毫升”为单位的，想弄到多少“克”的物品，就要用到所学的密度知识了。
Browse textbook, the density of of all kinds material is shown in at the moment. 3 5 after calculating except 2 ground, corresponding gram counts the milliliter number of a correspondence, be clear at a glance. In the meantime, I learned an error more intuitionisticly also: Be in a cup of mural grease, below lamplight Yi Yi is born brightness, and as if endless kind, how to fall very much. Pretty good, must become aware eventually on paper shallow, know this matter to want absolutely bend forward row, carry out with one's own hands more useful than gossip.
翻阅课本，各类物质的密度展现在眼前。三下五除二地算过后，相应的克数所对应的毫升数，一目了然。同时，我也更直观地学习到了误差：在杯壁上的油脂，在灯光下熠熠生辉，且仿佛无穷无尽般，怎样都倒不尽。不错的，纸上得来终觉浅，绝知此事要躬行，亲手实践比道听途说更有用。
Besides, still have the thing of a ” of “ be an armchair strategist. The table tennis game on the mobile phone, drawing a lot of people one definitely relative superiority or inferiority. But, online appear on the stage since ball wind unboiled water, can fall to the line, join drive possibly even brothers does not have a fault, does He Tan enter a hole to notch? For instance I. Just took the ball staff that that and I am about the same, blind disclose just wants to understand when move white ball, the billiards on this and line is the day is fastened poorly simply. Still know this matter to want absolutely as expected bend forward go. Not real ground is carried out, cannot have clear knowledge to the appearance of the thing.
除此之外，还有件“纸上谈兵”之事。手机上的台球游戏，吸引着许多人一决高下。但是，在线上台球风生水起，可到线下，甚至可能连击球都手足无错，何谈进洞得分？比如我。刚拿起那与我不相上下的球杆，盲目捅着白球时才想明白，这与线上台球简直是天差地别。果然还是绝知此事要躬行啊。不真正地实践一下，就无法对事物的面目有清晰的认识。
Must become aware eventually on paper shallow, know this matter to want absolutely bend forward row. The result of be an armchair strategist, it is failure, and the genuine knowledge that practice reachs, make succeed.
纸上得来终觉浅，绝知此事要躬行。纸上谈兵的结果，是失败，而实践所得出的真知，叫成功。(文/吕嘉腾)