在中文中,一般是先写所证明之事，然后在最后面另起一段，加上“特此证明”。或者是在开头就写“兹证明。。。。” 在英文中，通常在开头就直接写“This is to certify that .....”或“It is hereby certified that......”,即为“特此证明”之意。（注：这两种写法都很常见。）
同意楼上的,实际常用只有This is to certify that的句子.
This is to certify
特此声明 Hereby declare 特此证明 Hereby Certificated! ；Hereby to certify that... ; We hereby to certify.
写英文的类似文件，就要按英文的规则写。 英语的证明文件，一般在开始就写：THIS IS CERTIFY THAT....，就是“特此证明”的意思。
每家运营商的DNS都不同，而且各省的也不同。你可以问问你的网络提供商，他们会告诉你的。（也可以通过分别访问域名和IP来检查DNS是否正常，访问域名不行，而访问IP可以，则说明DNS设置不对） 另外，如果ADSL-电脑没问题，一般ADSL-路由器也没问题的。而且采用ADSL拨号的话，DNS可以不设置的，拨号成功后会自动取得DNS服务器。 问题可能出在路由器设置上。进去检查一下吧。看看上网方式，上网用户名密码是否正确。 （有个问题要注意一下，有些地方的运营商会限制使用路由器或者限制接入数量，一般是采取绑定网卡MAC地址的方式，如果路由器设置都正常，试试路由器的MAC地址克隆功能，把电脑网卡的MAC复制过去）
第一步：教育引导 不同年龄阶段的孩子“吮指癖”的原因不尽相同，但于力认为，如果没有什么异常的症状，应该以教育引导为首要方式，并注意经常帮孩子洗手，以防细菌入侵引起胃肠道感染。 第二步：转移注意力 比起严厉指责、打骂，转移注意力是一种明智的做法。比如，多让孩子进行动手游戏，让他双手都不得闲，或者用其他的玩具吸引他，还可以多带孩子出去游玩，让他在五彩缤纷的世界里获得知识，增长见识，逐渐忘记原来的坏习惯。对于小婴儿，还可以做个小布手套，或者用纱布缠住手指，直接防止他吃手。但是，不主张给孩子手指上“涂味”，比如黄连水、辣椒水等，以免影响孩子的胃口，黄连有清热解毒的功效，吃多了还可导致腹泻、呕吐。
一封表扬信Dear Manager: I am a reporter from the News Weekend. Because of the demand of my work, I often come to Beijing to do interviews. Your hotel is my favorite, because of the comfortable living conditions, and the considerate service, especially your excellent food. The restaurants in your hotel have many kinds of delicious food such as Chinese food, Japanese food, French food and so on. Among these delicious foods, I like the Beijing Toast Duck best, not only because of its Chinese characteristics but also its special taste for people from all over the world. So every time I come here I always choose this course. Furthermore, what impressed me most is the high quality service, it always makes me feel at home. Waiters and waitresses are so kind and warmhearted that they always earnestly recommend every new or special food of the restaurant. I will recommend your hotel and restaurant to my friends without any reservation and hesitation. Hope your hotel and restaurant will be more prosperous in the future. Sincerely yours, 投诉信（在一家商店买了一台彩色电视机，没有图象，与营业员交涉，没有得到满意解决，向商场经理写的一封投诉信）Dear xxx Manager of xxx hypermarket: I have purchased a color Tele from your store the day before yesterday, May 27th. It is only after I came back home that I realized the situation that it was without image. The shop assistant had indicated the samples, but the one i bought had not been shown on the spot. I had trusted them and thought it was a huge company which meant a big guarentee. I brought the set to the salespeople,and wanted to negotiate with them that It was not my fault, and it must be replaced with a new one by all means. How dare they deny like: the goods sold out from their counter are all premium quality. This kinds of problem was impossible to happen to them...and also added why I did not have a try on the scene, which made me quite annoyed. You know dear manager, your supermarket is a renowned one with good customer-service quality eversince its establishment. However, when the sales of yours were treating me like that yesterday. It's really getting on my nerves and I feel we customer is not god,but would rather say, dog. Could you please helping me out with this issue? I indeed don't wanna undergo this kind of service anymore. Thanks and await your reply. Yours faithfully 证明信（关于大学毕业证书） Let it be known that Mr. Wen Huang, native of Jiangsu Province, born on August 30, 1973, having specialized in Marketing in the Department of Economics & Management from Sept.1995 to July 1998 and having completed the four year undergraduate program with qualified standing,is hereby awarded this Certificate of Graduation.一则通知Notice of Foreign Language Department "Cultural influence on English learning" talks will be held in the Meeting Room of Foreign Language Department on Dec 8(Friday)by foreign nationality English professor-UFO,who is from Szechwan University.Thankyou!NotifiedbyForeignLanguageDepartment一则启示寻物启事-LostLost(寻物启事)At9: isSaturday,Mr.PerkincarelesslylosthissuitcasewhenhewenttoJinAncestralTemplefromYingzeStreetbybus.Thesuitcaseissquare,orangecolorandmadeofleather.Onitthereisametalhandletowhichalabelistied.AndPerkin’snameiswrittenonthelabel.InsidethesuitcaseisacameramadeinJapan,severalrollsoffilmandtwowoolenjackets.Inthe packet on the front cover puts a Chinese-English dictionary and two letters from U. S. A. In the back packet is a wallet with 1,000 dollars and a train ticket from Taiyuan to Beijing inside. Will the finder contact with Mr. Perkin, please? His telephone number is 7075441. Many thanks to the finder from Mr. Perkin. 本星期六上午九点半，Perkin先生从迎泽乘公共汽车去晋祠时，不慎将手提箱丢失。 手提箱为方形、桔色、皮制。提箱上有一个系着标签的金属提手。标签上写着Perkin的名字。箱内有一日本相机，几卷胶卷和两件毛料上衣。 箱前的口袋里放着一本汉英词典和两封美国来信。箱后有一装有1000美元的钱包和一张从太原到北京的火车票。 请拾到者与Perkin先生联系，他的电话号码是7075441。Perkin先生将不胜感激。
党员应妥善保存自己所携带的党员组织关系介绍信或证明信。介 绍信或证明信一旦丢失，党员要及时向党组织或办理转移组织关系的 党委组织部门报告。办理转移组织关系的党组织经审查后可予以补转。 对丢失介绍信或证明信的党员，应给予批评教育，情节严重的还应给 予适当的党纪处分。 对于介绍信或党员证明信过期，要分清原因和责任。对于无正当 理由不及时转移组织关系的，应给予严肃的批评教育，其中超过六个 月不参加组织生活的，要按照党章规定作自行脱党处理；如系经办人 的工作不慎造成的，要对经办人进行严肃的批评教育，过期的介绍信 或证明信作废，由开出介绍信或证明信的单位另行补转。