關於virus的英語作文

下面是本站小編整理的關於virus的英語作文，以供大家學習參考。

　　關於virus的英語作文：Computer Virus

A computer virus is a computer program that can copy itself and infect a computer without permission or knowledge of the user. The original may modify the copies or the copies may modify themselves, as occurs in a metamorphic virus. A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or carrying it on a removable medium such as a floppy disk, CD, or USB drive. Additionally, viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer. Viruses are sometimes confused with computer worms and Trojan horses. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. A Trojan horse is a file that appears harmless until executed. In contrast to viruses, Trojan horses do not insert their code into other computer files. Many personal computers are now connected to the Internet and to local-area networks, facilitating their spread. Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms. Furthermore, some sources use an alternative terminology in which a virus is any form of self-replicating malware.

The term comes from the term virus in biology. A computer virus reproduces by making (possibly modified) copies of itself in the computer's memory, storage, or over a network. This is similar to the way a biological virus works.

Some viruses are programmed to damage the computer by damaging programs, deleting files, or reformatting the hard disk. Others are not designed to do any damage, but simply replicate themselves and perhaps make their presence known by presenting text, video, or audio messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss.

There are many viruses operating in the general Internet today, and new ones are discovered every day.

　　關於virus的英語作文：

The computer virus is an outcome of the computer overgrowth in the cause of the term "computer virus" is the likeness between the biological virus and the evil program infected with origin of this term came from an American science fiction“ The Adolescence of P-1“　written by Thomas J. Ryan，published in n viruses invade a living cell and turn it into a factory for manufacturing viruses. However, computer virusesare small programs. They replicate by attaching a copy of themselves to another program.

Once attached to me host Program，the viruses then look for other programs to "infect" this way， he virus can spread quickly throughout a hard disk or an entire organization when it infects a LAN or a multi-user system. At some point，determined by how the virus was programmed the virus timing of the attack can be linked to a number of situations，including a certain time or date， the presence of a particular file，the security privilege level of the user，and the number of times a file is wise，the mode of attack -called "benign" viruses might simply display a message，like the one that infected IBM’s main computer system last Christmas with a season’s gnant viruses are designed to damage the attack is to wipe out data， to delete flies， or to format the hard disk.

What Kind of Viruses Are There? There are four main types of viruses: shell, intrusive, operating system and source ode. Shell viruses wrap themselves around a host program and don’t modify the original l programs are easy to write，which is why about half of viruses are of this type. Intrusive viruses Invade an existing program and actually insert a portion of themselves into the host usive viruses are hard to write and very difficult to remove without damaging the host file.

參考譯文：計算機病毒

計算機病毒是八十年代計算機飛速發展帶來的結果，計算機病毒這一名詞起因於在計算機上傳染的有害程序與生物學中病毒的相似性，該名詞起源於1977年出版的、由 Thomas J. Ryan寫的一本美國科幻小說《p-1的青春》。人體病毒入侵活的細胞後，就把它轉變成製造病毒的工廠。而計算機病毒是一些小程序，它們把自己的一個副本附加到另一個程序上面進行復制。

病毒程序一旦附加到一個主程序上，就開始尋找其他可以進行“感染”的程序。這樣，病毒就很快地佈滿整個硬盤，如果病毒感染了一個局域網或者一個多用戶系統，那麼就在整個組織內進行擴散。只有在某個點上病毒程序纔會發作(這是由病毒程序的設計所決定的)。攻擊的時間與多種情況有關，包括：某個時間或日期、特定用戶識別符的出現、用戶的安全保密等級和一個文件使用的次數。同樣，攻擊的方式也是各種各樣的。所謂的“良性”病毒可能只是簡單地顯示一個消息，如在去年聖誕節時，受感染的IBM公司的主要計算機系統顯示節日問候。惡性病毒被設計出來破壞系統。常見的攻擊方式是消除數據、刪除文件或者格式化硬盤。

　　關於virus的英語作文：

世界上已有許多國家發現了新型H1N1流感病毒(H1N1 flu virus)病例。據瞭解，人感染該病毒後會出現咳嗽、發燒、疲勞等症狀。爲了加強同學們的預防意識，(21世紀中學生英語報>正在舉辦徵文活動，請你給該報投稿，描述感染該病毒的症狀並談一談爲了預防該病毒我們該怎麼做，最後表達我們能戰勝病毒的信心。提示詞：cough, have a fever, feel tired, prevent, wash, exercise, sleep, believe

Nowadays, many countries in the world have found cases of the new H1N1 flu virus. It’s said that people with H1N1 flu virus will cough, have a fever and feel tired. To prevent the virus, we can do many things. Firstly, we’d better not go to places where there are many people. Secondly, we need to wash our hands often with soap and water, especially after we cough or sneeze. It's also a good habit for us to exercise regularly. It can not only help us keep fit but also improve our health against illness. And having a good sleep is important, too. People who are tired or under stress can get sick easily. And then, eat more fruit and vegetable to keep ourselves fit and strong. Last but not least, open the window and keep the air in the room fresh. If we all do these things, we will prevent the virus. So there is no need to be worried. I believe we will win through in the end.