anti-virus card的用法和樣例：
例句
- I spent most of the day Wednesday killing off the virus and vaccinating uninfected systems.
星期三那一天我把大部分時間花在清除病毒並給未受感染的系統安裝防病毒程序。 - We must have the common understanding that we should not let our guard down to prevent a new outbreak of the deadly virus.
國人仍須保持警戒之心，以防病毒再次肆虐，這是我們的共識。
