n. (c./u.)名詞 (可數/不可數)挑戰;難題Climbing Mount Everest is a challenge that many have attempted
v.t.及物動詞挑戰(某人)Kevin decided to challenge Bob to a game of tennis
n. (c./u.)名詞 (可數/不可數)對(某人)提出的挑戰After a moment's hesitation, the man accepted the challenge to a duel
v.t.及物動詞質疑(某事)You should not challenge your teacher so rudely in front of the class
n. (c./u.)名詞 (可數/不可數)對...的質疑The teacher ignored the challenge and carried on with the class
n. (c./u.)名詞 (可數/不可數)反對The lawyer raised a challenge to the evidence.
v.t.及物動詞考驗This exam will challenge even the best students.
v.t.及物動詞反對The opposition party challenged the government's new policy.
v.t.及物動詞盤問The guard challenged the intruder to identify himself.
n. (c./u.)名詞 (可數/不可數)威脅The rise of AI poses a challenge to many jobs.
n. (c./u.)名詞 (可數/不可數)口令The guard issued a challenge to the approaching figure.