challenge区别？

challenge区别？

challenge [?t??l?nd?]

[及物动词]

1)(invite to compete) 向…挑战

He received a challenge to a TV debate. 他接到电视辩论的挑战。

2. to challenge sb. to a duel 要求与某人决斗

I challenged him to show his proof. 我要他拿出证据。

3. (invite to justify) 要求…证明; 质疑

The event challenges an explanation. 那个事件需要解释。

to challenge sb.'s authority 质疑某人的权威

4. (test ability of) 激发; 激励

The new position challenged him to study still

harder during his spare time. 那个新职位激发他在业余时间更加努力学习。