It is harder to predict how Mr Obama's proposed reforms to the failing health-care system will turn out.

Being surrounded by white peers motivates a black student to work harder to succeed.

Activities like knitting and crocheting make it harder for the brain to register pain signals.

Although economic research and previous survey findings have shown that career interruptions related to motherhood may make it harder for women to advance in their careers and compete for top executive jobs, relatively few adults in the recent survey poin

But critics say the digital access codes represent the same profit-seeking ethos (觀念) of the textbook business, and are even harder for students to opt out of.

Confronted by a setback such as a disappointing test grade, students with a growth mindset said they would study harder or try a different strategy.

I really want to push harder and progress further.

If it is hard enough to define a team's membership, agreeing on its purpose is harder still.

She suggested that the brain can process just so much at once, and that activities like knitting and crocheting make it harder for the brain to register pain signals.

since industrialization, maintaining such a slow cultural metabolism has been much harder, with the long midday meal shrinking to whatever could be stuffed into a lunch bucket or bought at a food stand.

The amount of nicotine that's delivered in every cigarette is 10 percent higher than it was six years ago, which means that it's easier to get hooked and harder to quit.

The least that can be concluded from this research is that companies need to think harder about managing teams.

There are people who always wait until the last minute, and make it much harder than it needs to be.

These laws are also counterproductive, since they make it harder for people with criminal records to find housing or land a job, two key factors that reduce backsliding.

When making music gets too easy, says White, it becomes harder to make it sing.

But numerous studies have now found that when classroom material is made harder to absorb, pupils retain more of it over the long term, and understand it on a deeper level

We tend to equate（等同于）happiness with freedom, but, as the psychotherapist and writer Adam Phillips has observed, without obstacles to our desires it's harder to know what we want, or where we're heading.

She speculated that professors might try even harder to make classes interesting if they were to compete with the devices.

Naomi Pugh at Freed-Hardeman University speculated that professors would have to work harder to enliven their classes.

have to work harder to enliven their classes.

Strong campus presidents to manage these problems are becoming harder to find, and to keep.

They have a harder time getting a job with decent pay.

Maybe there is an Einstein out there today," said Columbia University physicist Brian Greene, "but it would be a lot harder for him to be heard.

it would be a lot harder for him to be heard" (Lines 1-2, Para

Exercise more and work harder.

A number of prominent economists have also argued that it's harder for the poor to climb the economic ladder today because the rungs (橫檔) in that ladder have grown farther apart.

Americans are working longer and harder hours than ever before.

But for real trees, it's harder to uproot.

He realized instinctively that simply training harder would never be enough.

Inequality is dangerous, he argued, not merely because it doesn't look good to have a large gap between the rich and the poor, but because inequality itself destroys upward mobility, making it harder for the poor to escape from poverty.

It is easy to change a light bulb, sure, but it is harder to change the bulb and its fixture.

living in college dormitories, there are no parents to tell you to study harder or stop wasting time.

Of course you're going to want to work harder and put the time and effort into it.

The harder the code, the more some people will try to figure it out.

There have been some indications that extra protein makes the kidneys work harder, which could be problematic for individuals with a history of kidney disease and for them, the supplements may increase the risk of kidney stones, the says.

When Jean-Claude killy made the French national ski team in the early 1960s, he was prepared to work harder than anyone else to be the best.

Whether it's a sports team or a presidential campaign, everybody relishes having the big momentum, because it makes them harder to stop or change direction.