challenge的形容词和名词

　　Schools must meet the challenge of new technology.

　　学校必须迎接新技术的挑战。

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

　　这家公司今后几年将面临重大的挑战。

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

　　这是对主席权威的直接质疑。

　　She does not like anyone challenging her authority.

　　她不喜欢任何人挑战她的`权威。

　　Building a home from scratch can be both exciting and challenging

　　建立一个全新的家庭既让人兴奋又富于挑战。

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

　　我愿意接受更大的挑战。