challenge

vt.

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

   我要他拿出證據。

2. 對……提出異議；懷疑；反對
   He challenged my view on that matter.

   他就我對那件事的看法提出異議。

3. 要求，需要；刺激，激發[O2]
   The new position challenged him to study still harder during his spare time.

   那個新職位激發他在業餘時間更加努力學習。

   The event challenges an explanation.

   那個事件需要解釋。

4. （哨兵，警衛等）查問；盤問
5. 【律】宣布反對（某陪審員等）