challenge
US:/ˈtʃæləndʒ/
UK:/ˈtʃælɪndʒ/
n.:
挑战；质疑；质询；挑战书
v.:
考查；盘问；对…怀疑（或质疑）；拒绝接受
网络:
向…挑战；挑战模式；叫板
Word forms: (复数) challenges (现在分词) challenging (过去式) challenged
Examples
1.
The opposition candidates face a challenge trying to persuade voters to choose their promises over the president's record.
而反对派候选人遇到的挑战是，试图说服选民为他们的承诺投票，而不要为总统的记录投票。
2.
The greatest challenge to computer game studies will no doubt come from within the academic world.
对电脑游戏研究最大的挑战将无疑来自学术世界内部。
3.
Just as how the AIDS epidemic seems to have overwhelmed medical scientists in the same way cancer has posed a great challenge also.
如同艾滋病让医学界的科学家们手足无措一样，癌症也向人们发起了了极大的挑战。
4.
We thought it would take a couple of years for him to reach this level, but he took to the challenge like a duck to water.
我们本来觉得他得好几年才能达到现在的水平，但他接受挑战如鱼得水。
5.
The difficulty knowing how much output is lost for good presents a horrible challenge to policymakers.
弄清楚有多少产出永久性丧失的难度很大，这对决策者构成了一个可怕的挑战。
6.
Retaining older staff has also been a challenge for companies trying to avert a labor crunch.
留住老职员对试图避免劳动力危机的公司来说也是个挑战。
7.
The way was open once more for the British to challenge the Dutch supremacy over the trade of Indonesia.
再次开辟了英国人向荷兰人在印尼的贸易霸权挑战的道路。
8.
But let me also profile the magnitude of the challenge with just a few statistics.
不过，我想仅用少量统计数据概述一下这项挑战的规模。
9.
The voltage challenge, meanwhile "seems to be a tougher road, " he said.
同时，电压方面的挑战看上去像是一条更艰难的道路，他说。
10.
SH: Up to today, I treasure every character that I played. Especially for this movie, I take it as a challenge to be different.
承宪：到现在为止，每一个作品我都很珍惜，特别是这部我非常喜欢是因为，本身我很想挑战这个性格的角色，周围人也都说好，我也认为不错哦。