challenge
noun uk/ˈtʃæl.ɪndʒ/ us/ˈtʃæl.ɪndʒ/
(DIFFICULT JOB)
B1 [ C or U ]挑战；难题；考验
(the situation of being faced with) something that needs great mental or physical effort in order to be done successfully and therefore tests a person's ability
Finding a solution to this problem is one of the greatest challenges faced by scientists today. 寻找这个难题的解决办法是当今科学家们所面临的最大挑战之一。
You know me - I like a challenge. 你了解我——我喜欢挑战。
It's going to be a difficult job but I'm sure she'll rise to the challenge. 这份工作会很有难度，不过我相信她会知难而上的。
- More examples
- Europe's finest golfers are getting ready for the challenge of the Ryder Cup.
- An awesome challenge lies ahead of them.
- Finding a cure for cancer is one of the biggest challenges facing medical researchers.
- I've promised to finish the task by Friday, but it's going to be quite a challenge.
- It could be a bit of a challenge getting the piano through the doorway.
(INVITATION)
[ C ]（尤指比赛或辩论）挑战（书），邀请
an invitation to compete or take part, especially in a game or argument
"I bet you can't eat all that food on your plate." "Is that a challenge?" “我敢打赌你吃不完自己盘里的食物?”“这是在叫板吗？”
[ + to infinitive ] She issued a challenge to her rival candidates to take part in a public debate. 她向与她竞争的候选人发出挑战，邀请他们参加一次公开辩论。
[ C ]（尤指社交网络上的，常为慈善性质）挑战书;参赛邀请
an invitation to do something difficult, funny, or embarrassing, especially on social media, often as a way of raising money for a good cause
The Ice Bucket Challenge, in which people filmed themselves being doused with icy water, raised awareness and over $100 million for the ALS Association. “冰桶挑战”的参与者拍摄了自己被冰水浇灌的画面，提高了人们ALS协会的认识并筹集了超过1亿美元的善款。
- More examples
- He issued Tom with a challenge to come out and fight.
- He thinks he can get to the top of the mountain quickest. That is his challenge to us.
(QUESTION)
C2 [ C or U ]质疑，怀疑
asking if something is true or legal
The result of the vote poses a serious challenge to the government's credibility. 投票结果使人们对政府的可信度提出了严重质疑。
Because of the way this research was conducted, its findings are open to challenge. 因为研究方法的问题，该项研究的结果颇让人怀疑。
(INSTRUCTION)
[ C ]（哨兵或警卫）喝停盘查
an instruction given by a soldier or guard at a border or gate, telling someone to stand still and say their name and reasons for being there
(REFUSAL)
[ C ] law specialized（对某人出庭担任陪审员表示的）反对，拒绝
the act of refusing to accept someone as a member of a jury
A challenge to a member of the jury should be made before the trial begins. 反对某人为陪审团成员的申明应在开审之前宣布。
challenge
verb [ T ] uk/ˈtʃæl.ɪndʒ/ us/ˈtʃæl.ɪndʒ/
(INVITE)
（尤指比赛或辩论）挑战，邀请
to invite someone to compete or take part, especially in a game or argument
Tina has challenged me to a game of poker 蒂娜向我挑战，要我和她玩扑克牌一决高低。
- More examples
- They challenged us to a game of football.
- Can I challenge you to a game of chess?
(DOUBT)
B2 质疑，怀疑
to question if something is true or legal
Children challenge their parents' authority far more nowadays than they did in the past. 如今子女对父母权威的质疑远远多于过去。
- More examples
- It was courageous of her to challenge the managing director's decision.
- Six journalists sought to challenge in court the legality of the ban on broadcasting.
- UK Union representatives are planning to challenge New Labour policy at the party conference.
- They did not dare to challenge the sacred cow of parliamentary democracy.
- They challenged all our beliefs.
(TEST)
考验…的能力（或决心）
to test someone's ability or determination
(STOP)
（在大门，边境等地）盘问，查问
to tell someone at a border or gate to stand still and say their name and reasons for being there
(REFUSE TO ACCEPT)
law specialized（对某人出庭担任陪审员）表示反对，拒绝
to refuse to accept someone as a member of a jury