You can rely on him to respond to a challenge.
你可以信赖他，他懂得应付挑战。
I called out a challenge, but there was no reply.
我发起了一个挑战，但是没人回应。
Taking her with me on official occasions has been a challenge.
在正式场合带上她对我而言是一种挑战。
This is a challenge in itself.
这本身就是一个挑战。
John found it a challenge to satisfy the boss.
约翰觉得让老板满意是一个挑战。
Feeding today's population is a challenge for an already-stressed environment.
养活今天的人口对已经很紧张的环境来说是一个挑战。
Traveling by subway can sometimes be a challenge, especially during rush hour.
乘地铁有时会是一种挑战，尤其是在高峰时间。
Abstract art offers both a challenge and the freedom to play with different interpretations.
抽象派艺术给不同的诠释方式同时提供了挑战与自由。
She beat off a challenge to her leadership.
她战胜了对她的领导地位的挑战。
It's a bit of a challenge I suppose.
我想这有点挑战性。
"It will be a challenge," said Professor Southwood.
“这将是个挑战。”索斯伍德教授说。
The other factor that posses a challenge is that I am dyslectic.
构成挑战的另一个因素是我是阅读困难者。
Proving theories is a challenge.
对理论的证明是一个挑战。
每个人都喜欢挑战。
Why is testing always a challenge?
测试为什么经常是个挑战呢？好？
所以这对我来说是一个挑战。
起初这对我而言是个挑战。
A challenge but not an impossibility.
是一个挑战但并不是不可能。
Instead, treat it as a challenge.
相反，把它当作挑战。
Women love a challenge just like guys.
女人和男人一样喜欢挑战。
Is eating healthy a challenge for you?
健康的饮食对你来说是一种挑战吗？
Using color well can be a challenge.
合理使用颜色很有挑战性。
This is a challenge, for several reasons.
这是一个挑战，基于一些原因。
But factories like this face a challenge.
但是这些厂子也面临一个挑战。
这是一个挑战。
这是一个挑战。
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