Schools must meet the challenge of new technology.

　　學校必須迎接新技術的挑戰。

　　The company faces major challenges over the course of the next few years.

　　這家公司今后幾年將面臨重大的挑戰。

　　It was a direct challenge to the president's authority.

　　這是對主席權威的直接質疑。

　　She does not like anyone challenging her authority.

　　她不喜歡任何人挑戰她的權威。

　　Building a home from scratch can be both exciting and challenging

　　建立一個全新的家庭既讓人興奮又富于挑戰。

　　I'm ready to do all those things which are more challenging.

　　我愿意接受更大的挑戰。