名詞 virus:

1. (virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid (DNA or RNA) wrapped in a thin coat of protein
2. a harmful or corrupting agency
3. a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer
   同義詞：computer virus

1. At some point, determined by how the virus was programmed the virus attacks.
   只有在某個(gè)點(diǎn)上病毒程序才會(huì)發(fā)作(這是由病毒程序的設(shè)計(jì)所決定的)。
2. The direct cause, such as a bacterium or virus, of a communicable disease.
   傳染原傳染性疾病的直接病因，例如某種細(xì)菌或病毒
3. Scientists have isolated the virus causing the epidemic.
   科學(xué)家們已分離出引起這種流行病的病毒。
4. We should be watchful of computer viruses.
   我們應(yīng)該警惕計(jì)算機(jī)病毒。

vi.rus

n.（名詞）
【復(fù)數(shù)】 vi.rus.es

Any of various simple submicroscopic parasites of plants, animals, and bacteria that often cause disease and that consist essentially of a core of RNA or DNA surrounded by a protein coat. Unable to replicate without a host cell, viruses are typically not considered living organisms.
病毒：各種動(dòng)物、植物和細(xì)菌的簡(jiǎn)單亞微觀寄生蟲(chóng)之一，常引起疾病，主要由核糖核酸或脫氧核糖酸的一個(gè)核組成，周?chē)械鞍踪|(zhì)包圍。離開(kāi)寄主細(xì)胞不能復(fù)制本身，病毒通常不被認(rèn)作為是生物體
A disease caused by a virus.
病毒病：病毒引起的一種疾病
Something that poisons one`s soul or mind:
毒素，毒害：毒害某人靈魂或思想的事物：
例句：
the pernicious virus of racism.
種族主義的有害影響

Computer Science A computer virus.
【計(jì)算機(jī)科學(xué)】 計(jì)算機(jī)病毒

來(lái)源：
Latin vorus [poison]
拉丁語(yǔ) vorus [毒藥]