challenge

vt.

1. 向……挑战[（+to）][O2]
   I challenged him to show his proof.

   我要他拿出证据。

2. 对……提出异议；怀疑；反对
   He challenged my view on that matter.

   他就我对那件事的看法提出异议。

3. 要求，需要；刺激，激发[O2]
   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。

   The event challenges an explanation.

   那个事件需要解释。

4. （哨兵，警卫等）查问；盘问
5. 【律】宣布反对（某陪审员等）