challenge
D.J.[ˈtʃælindʒ]
K.K.[ˈtʃæləndʒ]
n.
挑战,邀请比赛
怀疑,质问
艰巨的任务
vt.
挑战
质疑
I did not think he was right,so I challenged him.
我认为他是不对的,因此向他提出质疑.
考验
The job doesn't really challenge him.
这项工作不能真正地考验他.