jack is back
jack is backjack is back
1
Jack is back on his feet after a long illness.
杰克病了好长时间，现在恢复健康了。
2
The news buzzing all around Silicon Valley is probably one and the same: "@jack is back. "
近来，硅谷传得最热的一条新闻恐怕就是“杰克回来了。”
3
Jack is back home from the zoo.
杰克从动物园回家了。
4
i'm very glad to know that jack is back.
据说杰克归来了我很是开心。