500字英语作文大学生活【一】
是写信人对收信人的称呼用语。位置在信内地址下方一、二行的地方，从该行的顶格写起，在称呼后面一般用逗号(英国式，也可以用冒号(美国式。
(1写给亲人、亲戚和关系密切的朋友时，用dear或my dear再加上表示亲属关系的称呼或直称其名(这里指名字，不是姓氏。例如：my dear father，dear tom等。
(2写给公务上的信函用dear madam，dear sir或gentleman(gentlemen。注意：dear纯属公务上往来的客气形式。gentlemen总是以复数形式出现，前不加dear，是dear sir的复数形式。
(3写给收信人的信，也可用头衔、职位、职称、学位等再加姓氏或姓氏和名字。例如：dear prof. tim scales, dear dr.john smith。
500字英语作文大学生活【二】
yesterday i read a book the name of the book is《dr bethune》.
dr bethune was a famous doctor from canada. in 1938 he came to china. at that time china was at war with japan. he worked as a doctor in the chinese army and saved many soldiers’ lives. he worked very hard and became sick. dr bethune died in 1939. he was only 49 years old. he was a good man and we remember him today.
i think the book is very very good!
written by wu qingxiang
mar. 31
how to do research
——reading after a science paper
these days i am busy preparing my dissertation which is about web usage mining . i read some english papers and learnt much from them . and now i want to say something about a paper titled “web usage mining：discovery and applications of usage patterns from web data”.
this is the first english paper i read about dissertation and gave me great help .
this paper is a review about web usage mining. it introduced web usage mining in detail . although it is a little old for it was published in its contents are very useful today . it is organized according to the sequence of web usage mining and the six main parts are introduction which tells me what is web usage mining the sources and abstraction of web data the three steps of web usage mining taxonomy and project survey websift overview privacy issues . the third and fourth parts are most important . it had a list of existing project about web usage mining which i saw many times in other papers but this paper is the one creating this list . besides it has been referred for more then twenty times . as we all know that the higher the referred number is the more important the paper is so i consider this paper to be an important and successful one in this region.
in my opinion the success of this paper dues to three reasons . the first reason is the profound computer knowledge owned by the authors . web usage mining relates to many subjects such as artificial intelligence ontology semantic analysis but the most basic knowledge is computer science . the four authors are all professors of department of computer science and engineering in university of minnesota . for myself i am not major in computer science and i am not very good at computers so i feel a little difficult to understand technologies used in this region.
second they had read a large number of papers before they wrote this paper . there are fifty nine references listed after main contents . “stand on the shoulders of giants” this sentence tell us a truth : one can never successful all by oneself . and what’s more learn from others can save a lot of time and energy especially for us new learner . how to learn from others is a skill all of us should master but learning doesn’t mean copy or plagiary . other people’s knowledge and production is just our foundation upon this foundation we must have our own thoughts and creation. there are many remarks in this paper where referred other’s production.
third the authors had the experience of developing a web usage mining project . they don’t just engage in idle theorizing so their comprehension on this issue is greatly profound. they know what we may meet in a real project development and they know how to resolve them . after reading this paper i also read some other papers written in chinese . some of them are not based on real project and can not give useful resolution . websift is the name of system they developed which can be used to data mining and analysis .
i wrote this article not only because it gave me much help in preparing my dissertation but also because it tells me how to study and how to do research . honesty and preciseness are two essential making a researcher must have . hard-working is the necessary condition leading to success . this is just the beginning of my dissertation i should learn from these four authors both their knowledge and their attitude to study.
500字英语作文大学生活【三】
在英语村里，模拟了现实生活中的四个场景——“城市馆”、“自然馆”、“生活馆”和“商业馆”，四个场馆中的部分物品和布景都是实物，每个场馆又被分成几个场景，外教和中教轮流授课，我们这次可真是与英语世界来了个亲密接触。在全英语的语言环境和实物情境下，我们对学习英语的兴趣变得前所未有的高涨。就比如说在城市馆里吧，刚进城市馆，一个美丽的大都市——上海的模型立刻呈现在我们的面前，那一个个地标性建筑物的模型，在镭射灯光的映衬下是显得格外的雄伟壮丽，你甚至猜想不到的是在城市馆里居然会有一节能移动的地铁车厢，在最后一节课中，老师终于带着我们“乘坐”了一次地铁，这“地铁”中，老师不停的作者令人捧腹的`动作，使得大家都争先恐后的想“乘坐”一次平时已经坐得习以为常的地铁。每当外教拉开悬挂的粉红色幕布时，或旋转布景板进行场景切换时，我们都会发出声声惊叹，因为，我们以前从来没有这样学习过英语。在商业馆的超市里，甚至可以看到真实的收银机等等实物，我们真实地体验着用英语对话来购物的整个流程，我们扮演着不同的角色，来学习这个角色所要说得话；在生活馆里，老师会用英语生动地为我们介绍各式厨具用品，并且还和我们做游戏，让我们在游戏当中来巩固与加深你对这个英语单词的印象，如果你读得好的话，老师会和你拍手，表示鼓励；在自然馆中，我们仿佛亲身来到了大自然中，有热带雨林，有北极，海洋，在教室的墙上还贴着国家的地图和标着英语单词的国旗名称，在自然馆中最有趣的还是要数在进门时有一座假山，不高的假山上悬挂着一个吊绳，仿佛可以真的用来攀岩一般。我们不时为老师们幽默、生动的语言、表情和肢体动作爆发出阵阵笑声，为同学的精彩表现鼓掌加油。
通过这次活动，让我们在现实生活中快乐的学习了一次英语，也然我的英语水平提高了不少，希望以后这样的实践活动多一些，能够我们丰富我们的课外生活。我期待着有更多的同学能来到这个英语村里来，让他们也体验到更多学习英语的快乐！
