And these include the herpesviruses and HIV, while the ones that lack the envelope such as poliovirus are called non-enveloped or " naked" viruses.
其包括疱疹病毒、人类免疫缺陷病毒（HIV）；而缺乏囊膜的病毒，如脊髓灰质炎病毒，被称为无囊膜病毒或裸病毒。
Naked virus
原声例句
Osmosis-微生物
Osmosis-微生物
They are naked viruses, about 30 nanometers in diameter, and they're surrounded by an icosahedral capsid, which is a spherical protein shell made up of 20 equilateral triangular faces.
它们是直径约30纳米的裸露病毒，被二十面体衣壳包围；二十面体衣壳是由20个等边三角形面组成的球形蛋白质壳。
英语百科
Virus
A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.
Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, about 5,000 virus species have been described in detail, although there are millions of types. Viruses are found in almost every ecosystem on Earth and are the most abundant type of biological entity. The study of viruses is known as virology, a sub-speciality of microbiology.
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