B2 an extremely small piece of organic material that causes disease in humans, animals, and plants病毒
B2 a disease caused by a virus病毒病,病毒性疾病;病毒感染
More examples
A local doctor was the first to raise the alarm about this latest virus.
The virus is contracted through exchange of bodily fluids.
All the tomato plants are infected with a virus.
The doctors have attributed the cause of the illness to an unknown virus.
It's possible to pass on the virus to others through physical contact.
B1 a computer program or part of a computer program that can make copies of itself and is intended to prevent the computer from working normally计算机病毒
Examples
A computer virus may lurk unseen in a computer's memory, calling up and infecting each of the machine's data files in turn.
The virus deletes files and corrupts essential core microchips leaving computers unusable.
All their customer information was wiped off the computer by a virus.
If you think there may be a virus, don't open the attachment.
I got a virus alert when I downloaded my email.
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