urban是什么意思？

SAT scores began dropping in 1963;today,on average,30% of students do not complete high school in four years, a figure that rises to 50% in poor urban neighborhoods.

And most noticeable of all, there is the phenomenon of large urban and suburban high schools that have split up into smaller units of a few hundred, generally housed in the same grounds that once boasted thousands of students all marching to the same band.

A great variety of schools have sprung up in urban and suburban areas.

According to an urban design professor, it is difficult for city designers to foresee what happen in the future.

An urban food myth contends that if food spends just a few seconds on the floor, dirt and germs won't have much of a chance to contaminate it.

Between now and 2050, the urban population of Africa could triple.

Brent Ryan, who teaches urban design at MIT, says Songdo proves a universal principle.

Most urban Africans live in slums migrants are often not much better off than they were in the countryside.

Most urban Africans work for a small minority of the rich, who tend to be involved in either cronyish businesses or politics.

pigeons are often seen as dirty birds and an urban nuisance but they are just the latest in a long line of animals that have been found to have abilities to help humans.

That was actually Songdo, " says Jung Won Son, a professor of urban development at London's Bartlett School of Planning, "Part of the reason to shoot there is that it's new and nice.

Teachers in low-income urban and rural areas with no history of participating in math competitions may not know about advanced-math opportunities like MathCounts—and those who do may not have support or feel trained to lead them.

While the practice carries serious health risks for many, those dangers are outweighed by the social and economic gains for poor urban farmers and consumers who need affordable food.

Those dangers can be addressed with farmer and consumer education, he said, while the free water and nutrients from human waste can help urban farmers in developing countries to escape poverty.

There is a large potential for wastewater agriculture to both help and hurt great numbers of urban consumers, said Liqa Raschid-Sally, who led the study.

The report focused on poor urban areas, where farms in or near cities supply relatively inexpensive food.

This nameless person pushed the human race over a historic threshold, for it was in that year that mankind became, for the first time in its history, a predominantly urban species.

Those factors are more than enough to make up for the squalor (肮脏), disease and spectacular poverty that those same migrants must often at first endure when they become urban dwellers

His main thesis is that the buzz of urban life, and the opportunities it offers for co-operation and collaboration, is what attracts people to the city, which in turn makes cities into the engines of art, commerce, science and progress.

For the first time in history, urban people outnumbered rural people

Modern urban life in rich countries is not well adapted to large families.

There isn't much violent crime in a small town like Green Ville, or at least not as much as in the large urban areas.

"There is a large potential for waste water agriculture to both help and hurt great numbers of urban consumers," said liqa Raschid-Sally, who led the study.

Globally, urban populations are expected to double in the next 40 years, and an extra 2 billion people will need new places to live, as well as services and ways to move around their cities.

In many of these cities such as Denver, a diverse and vigorous economy attracted to the urban core has offered stable employment for residents.

Still, the track coach had offered me a walk-on spot, and I actually found the urban Atlanta campus a decent consolation prize after New York city.

Teachers in low-income urban and rural areas with no history of participating in math competitions may not know about advanced-math opportunities like Math Counts—and those who do may not have support or feel trained to lead them.

The persistent haze over many of our cities is a reminder of the polluted air that we breathe, over 80% of the world's urban population is breathing air that fails to meet World Health Organisation guidelines.

The right urban mix has propped up home occupancy, increased property values, and attracted significant investment capital.

Twenty years ago, the Urban Land Institute defined the two types of cities that dominated the US landscape: smaller cities that operated around standard 9-5 business hours and large metropolitan areas that ran all 24 hours of the day.

with the rise of a new concept in urban planning that aims to make life easier and more convenient, however, increasing popularity for urban areas that caused the real estate pushes, in major cities like San Francisco or New York, has inspired a type of f