例句與造句

1. His interest in IT security began when his work computer was infected with the Cascade virus in 1989 and he developed a program to remove it.
2. More to her taste, she said, is the Cascade virus from the early'90s, which caused a document's letters to tumble to the bottom of the screen.
3. It's difficult to find cascade virus in a sentence. 用cascade virus造句挺難的