challenging

Statistics and logic are both challenging subjects.

It is intellectually challenging.

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.

Just as it's challenging to smoke while knitting, when hands are holding needles and hooks, there's less snacking and mindless eating out of boredom.

These are processes that you are developing so that you are able, over time, to tackle more interesting problems, more challenging problems 一 problems that require many people instead of one person, and many skills instead of one.

Those who engaged in activities that were not intellectually challenging, either in a social group or alone, did not show such improvements.

The second rule is don't raise the stakes by challenging her authority.

The author's second warning is that we should avoid running a greater risk by challenging our boss's anthority

The STEM subjects are too challenging for students to learn.

Some hoped his rise to prominence would have a big impact on white Americans, too, challenging those who still harbour racist sentiments.

The change cut their expenditures in half, but the new living arrangement proved too challenging.

killy then began challenging the basic theories of racing technique.

Now, all of these problems involve significant costs for all businesses, but there're particularly challenging issues for small- and medium-sized enterprises.

Some previous studies have suggested that challenging your brain with mentally stimulating activities might help.

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

These studies are confirming, challenging and extending what's been found using more traditional approaches.

We are usually tired already by the time we get on a plane, and the crowded apace and unstable Internet connection make work more challenging.

Adaptation to climate change is challenging.

For new reporters, this can seem like a challenging task.

Group exercise is challenging, yet fun and empowering! of course everyone knows that exercise is good for the body.

It's more likely that none of us start a conversation because it's awkward and challenging, or we think it's annoying and unnecessary.

Toknow magazine is a big hit in the world of children's publishing, bringing a unique combination of challenging ideas and good fun to young fans every month.

sit down to read and the flywheel of work-related thoughts keeps spinning一or else you're so exhausted that a challenging book's the last thing you need.

Some Congress members are trying to block the plan, and at least a dozen industry groups, four states, and three environmental groups are challenging it in federal court.