单词：viruses
n a harmful or corrupting agency
n a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer
viruses的用法和样例：
例句
- Some viruses incubate very rapidly.有些病毒繁殖得很迅速。
- The transfer of pig viruses to humans is unlikely.此疗法导致感染猪病毒的机率极小。
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