challenge是什么意思？

is something few can accomplishneeds some practice firstrequires a lot of patienceis a challenge at the beginningThey find it even more difficult.

Toilet paper manufacturers are facing a great challenge in promoting its sales.

In a challenge for manufacturers, 81% of paper product users said they would consider buying recycled toilet tissue if it were comparable in quality to standard paper.

We can live a peaceful life despite the various challenges of the modern world.

The biggest challenge here is irrigation, which consumes 70% of the world's fresh water.

It may constitute a challenge to computer programmers.

Is it possible to enjoy a peaceful life in a world that is increasingly challenged by threats and uncertainties from wars, terrorism, economic crises and a widespread outbreak of infectious diseases? The answer is yes, according to a new book The 10 Golden Rules: Ancient Wisdom from the Greek Philosophers on Living a Good Life.

They avoid challenges because challenges make mistakes more likely.

Such children believe challenges are energizing rather than intimidating ( ' , 令人生畏); they offer opportunities to learn.

It poses a great challenge for customers to do math.

This might be a small change to the way we view work and the office, but the researchers argue that it challenges a widespread characteristic of the economy: work organized by clock time.

As a leader, it can be challenging to create an environment in which people will freely disagree and argue, but as the saying goes: From confrontation comes brilliance.

There are, however, challenges.

One of the challenges to build an interactive digital textbook from the ground up is that is takes a great deal of manpower

They tend to be slow in confronting new challenges.

It was challenged by some climate and risk experts.

They hoped to challenge the claim that he never slept.

Statistics and logic are both challenging subjects.

It is intellectually challenging.

Mike Ellicock,chief executive of National Numeracy said we want to challenge this "I can't do maths" attitude that is prevalent in the UK, adding that it was vital that all primary school teachers understand key maths concepts as young children who fail t

Teaching ethics to a machine even more intelligent than we are will be the bigger challenge.

The general consensus is that the best ones avoid mindless violence, and instead focus on strategy and challenge us to solve problems and achieve broad goals.

These are games that challenge you to think deeply and to develop your analytical skills.

Traditional CBT is considered an effective form of talk therapy for depression, helping people challenge negative thoughts and change the way they think in order to change their mood and behaviors.

While the city council vote was met with applause inside the council room, opponents to the measure, including soda lobbyists made sharp criticisms and a promise to challenge the tax in court.

The video challenge does not put individual students on the hot seat—so it's less intimidating by design.

The challenge is if certain types of people are doing something, it's difficult for other people to break into it, said Po-Shen Loh, the head coach of last year's winning U.S.Math Olympiad team.

The Math Video Challenge is a competition, but a collaborative one.

In the past few years, MathCounts added two new middle school programs to try to diversify its participant pool—the National Math Club and the Math Video Challenge.

After the high-pressure Countdown round at this year's national MathCounts competition, in which the top 12 students went head to head solving complex problems in rapid fire, the finalists for the Math Video Challenge took the stage to show their videos.

2% in November and December at stores open more than a year, a disappointing holiday season performance that capped a difficult year for a department store chain facing wideranging challenges.

How does one figure out who is a weak teacher? Yes, that's a challenge.

He challenges Liqa Raschid-Sally's conclusion.

While we argue phasing out racial terminology ( ' , 术语 ) in the biological sciences, we also acknowledge that using race as a political or social category to study racism, although filled with lots of challenges, remains necessary given our need to understand how structural inequities and discrimination produce health disparities ( ' , 差异 ) between groups, Yudell said.

Those simultaneous challenges appear less overwhelming with increasingly better answers to a centuries-old question: how to make power portable.

Doing away with racial discrimination is challenging.

At least three Russian stations are already operating in Antarctica, part of its effort to challenge the dominance of the American GPS, and new stations are planned for sites like the Russian base, in the shadow of the Orthodox Church of the Holy Trinity.

To make matters worse, these schools are ill-equipped to graduate these students— young adults who face specific challenges and obstacles.

They tend to offer too many less challenging courses.

Students who take more challenging classes and spend more time studying do learn more.

On entering college, Nijay Williams had no idea how challenging college education was.

It fails to prepare students to face the challenges of modem times.

In particular, Arum and Roksa found, college students were not developing the critical thinking, analytic reasoning and other higher-level skills that are necessary to thrive in today's knowledge-based economy and to lead our nation in a time of complex challenges and dynamic change.

If, for example, building codes included green construction guidelines, most developers would be too lazy to challenge them.

Economic inequality is the defining challenge of our time.

After the high-pressure Countdown round at this year's national Math Counts competition, in which the top 12 students went head to head solving complex problems in rapid fire, the finalists for the Math video Challenge took the stage to show their videos.

Another challenge to language survival is television.

Economic inequality is the "defining challenge of our time".

In the past few years, Math Counts added two new middle school programs to try to diversify its participant pool—the National Math Club and the Math video Challenge.

It is yet a challenge to explain the cause-and-effect relationship between sleep and nutrition.

One key challenge facing young scientists is how to be open without becoming scientifically vulnerable.

So now, the main challenge was to find the right material for printing clothes with, I mean the material you feed the printer with.

The biggest and most exciting challenge of this technology is how to creatively leverage this ever-growing amount of data to deliver cost savings, improvements and tangible benefits to both businesses and citizens of these smart cities.

The challenge here, of course, is ensuring that what an amateur community considers to be responsible, actually is.

The Math video Challenge is a competition, but a collaborative one.

This is a grand challenge for our age and it may require an "irrational" response.