challenges

1. [C]挑战; 邀请比赛 invitation or call to sb to take part in a game, contest, fight, etc. to prove who is better, strong, more able, etc.
2. [C]怀疑,质问; 要求 statement or action which questions or disputes sth
3. [C]艰巨的任务 difficult, demanding or stimulating task

1. vt. 挑战 invite sb to compete against one in a fight match
2. vt. 质疑 question the rightness or legality, etc.
3. vt. 考验 test the abilities

• accept a challenge应战
• face an challenge面临着挑战
• give a challenge挑战
• meet the challenge对付挑战
• pose challenges提出挑战
• refuse a challenge拒绝挑战
• send a challenge送挑战书

• loud challenge强烈的要求
• angry challenge愤怒的挑战
• direct challenge直接的挑战
• fierce challenge激烈的挑战
• public challenge公开的挑战
• sharp challenge尖锐的挑战

• beyond challenge无与伦比
• letter of challenge挑战书
• under challenge of处于…局面
• with challenge挑衅

• challenge of life生活的挑战
• challenge to a duel决斗的挑战
• challenge to jurors要求陪审员回避
• challenge to mankind对人类的挑战
• challenge to the world向世界挑战

• challenge a theory对某理论提出异议
• challenge understanding需要认识

• challenge sb for lying因某人说谎而质问
• challenge sb to battle挑起战争
• challenge sb to fight向某人挑战

meet the challenge迎接挑战；满足要求

rise to the challenge接受挑战，奋起应付挑战

take up the challenge应战

challenge cup挑战杯；优胜杯；奖杯

1. The crossing of this dangerous river was a challenge to most of us.
   对我们大多数人来说,横渡这条充满危险的大河确实是个挑战。
2. He accepted his friend's challenge to swim across the river.
   他接受朋友提出的挑战，游过这条河。
3. We accepted their challenge to a baseball game.
   我们接受了他们棒球邀请的挑战。
4. He ignored the sentry's challenge to halt.
   他不理睬哨兵喝令止步的盘问。
5. Their legal challenge was unsuccessful.
   他们的法律质疑未获成功。

1. Nowadays no one will challenge the fact that the earth is round.
   现在没有人会对地球是圆的这一事实提出异议。
2. New competitors are emerging to challenge the old economic arrangements.
   新的竞争对手正在崛起，向旧的经济布局挑战。
3. The sentry challenged the stranger at the gates.
   哨兵查问在门口的陌生人。
4. I did not think he was right, so I challenged him.
   我认为他是不对的，因此向他提出质询。