certain是什么意思？

Donohue, now a history teacher, agrees that it helped during certain parts of her education: I can definitely remember what I learned on certain days at school.

Consumers are loyal to certain brands.

The study, which followed more than 2,000 healthy adults between the ages of 18 and 60, found that certain mental functions—including measures of abstract reasoning, mental speed and puzzle-solving—started to dull as early as age 27.

In general, Salthouse and his colleagues found, certain aspects of cognition ( ' , 认知能力) generally started to decline in the late 20s to 30s.

Declining mental function is often seen as a problem of old age, but certain aspects of brain function actually begin their decline in young adulthood, a new study suggests.

The helpless ones believe intelligence is a fixed characteristic: you have only a certain amount, and that's that.

It's commonly known that certain diseases are linked with occupations like lung disease in coal miners.

It might mean monitoring employee productivity on a digital leaderboard and offering prizes to the winners, or giving employees digital badges or stars for completing certain activities.

Early kites were built for certain uses.

Any research that suggests that abilities to perform certain behaviors are based in biology is controversial.

Only certain parts of the eye can be replaced.

A drop in oxygen pressure can cause headaches in certain individuals.

Also, certain types of bacteria are extremely harmful, and it takes only a small number to make you sick.

Back in June, the Federal Communications Commission fined AT&T $100 million over accusations that the carrier secretly reduced wireless speeds after customers consumed a certain amount of data.

California has been facing a drought for many years now, with certain areas even having to pump freshwater hundreds of miles to their distribution system.

Donohue, now a history teacher, agrees that it helped during certain parts of her education: "I can definitely remember what I learned on certain days at school."

In the second experiment meant to pit the mice's hunger against their fear, hungry mice were placed in a cage that had certain "fox-scented" areas and other places that smelled safer but also had food.

It has been found that not eating breakfast is related to the incidence of certain diseases in some countries.

Or like speeding, it's very easy to put speed cameras in certain places.

Public health groups applauded the approved tax as a step toward fixing certain lasting health issues that plague Americans.

Student teachers are motivated to help Betty master certain materials.

The medical community also takes aging for granted, and can do nothing about it except keep people within a certain health range.

These games will get you used to thinking in a certain way.

This is only at certain times and on condition that they are processed at factories based near Japanese ports.

They have changed the previous migration habits of certain birds.

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 belief that research data is private intellectual propertyThe concern that certain agencies may make a profit out of it.

In fact, they are prescribed and they’regiven at a certain level, a dosage that is understood by a practitioner who’s been trained.

Without sustained external pressure it seems certain Mr.

They had certain ingredients missing.

Racial terms are still useful in certain fields of study.

There are certain products andservices that are very suitable for selling online, and others that simply don’t work.

But economists who study the relationship between money and happiness have consistently found that, above a certain income, the two do not reliably correlate.

Certain conclusions are nonetheless clear

First, we decide whether we are superior or inferior to others on certain dimensions, such as attractiveness, intelligence, popularity, etc.

At certain stages of life, especially adolescence, the pressure to be seen as similar to peers is immense

On occasions it is the fear that certain disclosures may be unacceptable to family or friends that motivates an individual to seek professional help.

It is by no means certain that the settlement will be enacted (执行) – it is the subject of afairness hearing in the US courts.

But what is certain is that, in some way or other, Google's entrance into digital book selling will have a significant impact on the book world in the years to come

That conclusion was reinforced by another finding: that their opposition appeared to soften when that fiscal burden decreased, as occurred with welfare reform in the 1990s, which curbed immigrants' access to certain benefits.

It takes a certain type of person who will bang his head against the wall because you believe you'll find the solution.

This might seem like the ultimate defeat for racism, but ignoring the race of certain select individuals—a phenomenon that psychologists call subtyping—also has an insidious (隐伏的) side.

Mandelbrot, who did the experiment with stock exchanges prices, for example, noted that although the outcomes were variable, there were in fact certain constancy

There are certain underlying similarities

Explain certain natural phenomena.

It enhances immunity to certain diseases

Workers have the legal rights to refuse certain unsafe work assignments under two federal laws: the Occupational Safety and Health Act and the National Labor Relations Act.

And grass-fed dairy and meat have been shown to be higher in certain nutrients and healthy fats.

But even without gadgets that understand our spoken commands, research suggests that, as bizarre as it sounds, under certain circumstances, people regularly ascribe human traits to everyday objects.

But there are certain situations that do warrant extra protein.

Flight attendants, firefighters, and police officers have to be over a certain height, and be physically fit.

When a tree first starts growing in a certain area, it's likely that the 27 climatic envelope—the temperature, humidity, rainfall patterns and so on—suits it.

However, there are certain advantages of public universities, such as the fees being free.

I'm certain of it, absolutely, especially if it's difficult for a competitor to copy.

In fact, they are prescribed and they're given at a certain level, a dosage that is understood by a practitioner who's been trained.

It is certain that the Census procedures, which lump the online sales of major traditional retailers like Walmart with "'non-store retailers" like food trucks, can mask major changes in individual retail categories.

Joseph has learned that a farmer has to have a certain mindset to successfully convert.

So it was pretty certain that the enemy would not be able to understand the code talkers.

The developing brain, the report says, is particularly vulnerable to the toxic effects of certain chemicals these products may contain, and the damage they cause can be permanent.

There are certain products and services that are very suitable for selling online, and others that simply don't work.

When they detect an extended dry period, they divert their metabolisms, producing sugars and certain stress- associated proteins and other materials in their tissues.

without sustained external pressure it seems certain Mr. Cameron would still be hooked on the interests of big tobacco companies