重要
challenge
/ˈtʃælɪndʒ/📚 1779 49 4四级六级考研托福雅思高考A challenge is something new and difficult which requires great effort and determination. 挑战
noun [抽象名词]挑战，难题；挑战书，比赛邀请；质疑，质询；喝停盘查
The new government's first challenge is the economy.
新政府面临的第一项挑战是经济。
verb [vt. 及物动词]挑战，向……下战书；质疑，拒绝接受；盘问，查问；考验
Democratic leaders have challenged the president to sign the bill.
民主党领导人对总统签署这项法案存有质疑。
- challenge 出现在下面的课文中
- Lesson 10 Silicon valley
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