challenge

过去分词：

动词过去分词: challenged

更多词形：

形容词: challengeable | 动词过去式: challenged | 动词过去分词: challenged | 动词现在分词: challenging | 动词第三人称单数: challenges |

单词例句：

A doubled fist expresses challenge.

紧握的拳头表示挑战。

To build a road in the mountainous area was a real challenge.

在山区修筑公路确是艰钜的事。

I am confident they will move the American economy ahead, move it firmly and soundly so that there will never be a time when the Soviet Union will be able to challenge our superiority in this field.

我确信这些建议能把美国经济推向前进，使之稳步而合理地发展、让苏联在经济上没有挑战我们超级大国地位的机会。

Marathons are the real McCoy these little jogs are no challenge at all.

马拉松赛跑才是真玩意儿--这些慢跑根本不算回事。

The time was ripe for a challenge to the power of the government.

时机已经成熟，可以向政府权力提出挑战了。

Something, such as a glove, that is offered or thrown down as a pledge or challenge to fight.

象征挑战而扔下的手套如手套等作为挑战而主张送出或扔在地上的物品

Never challenge a fool to do wrong.

不要怂恿愚人干错事。

Are you going to take the challenge lying down.

你打算屈服于这种挑战吗？

The challenge for educators is to restructure the curriculum to make maximum use of the new technologies so that students can learn better and prepare themselves for the information-rich world they now confront.

对教育工作者提出的要求，就是要调整学校的课程来最大限度地使用新的技术，以便学生能够学得更好，并为他们现在所面临的信息丰富的世界而早作准备。