管理员摘要：
例句： Bill was stimulated by the challenge. 比尔受到该挑战的激励。 She beat off a challenge to her leadership. 她战胜了对她的领导地位的挑战。 I hope that he proves equal to the challenge. 我希望他最后能应付这一挑战。……
例句：
Bill was stimulated by the challenge.
比尔受到该挑战的激励。
She beat off a challenge to her leadership.
她战胜了对她的领导地位的挑战。
I hope that he proves equal to the challenge.
我希望他最后能应付这一挑战。