your biggest challenge
In order to continue to challenge new things, in order to meet new needs, we work day in day out in R&D.
One of the important differences between Japanese and Americans is that Japanese tend to choose a safe course in life, while Americans choose to explore and challenge life.
Thirdly, if you don't put in the effort and challenge difficult things, there is nothing in the world at which you will succeed.
The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy.
Building the first skyscrapers was an amazing challenge, but nowadays modern machines make it a bit easier.
To provide medical care for every citizen is a big challenge, even for developed countries.
This discovery challenges traditional beliefs.
If we responded to every fledgling challenger... who wants to make a name for themselves, it wouldn’ t be fair to us
I was bored with my job and felt I needed a new challenge.
The construction of Warsaw's second metro line was a big financial and technological challenge.
How about I challenge you to a question you might not know the answer to?
When I accepted this job, I was looking for a new challenge and ways to channel my creative ability.
the challenge for the twenty-first century is transport in space
I thought it would be boorish to challenge his identity without warning.