Over the years,researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers.

VOA: special.2009.07.15

We also, therefore, have no sense that God is imminent in nature or tied to natural substances or phenomena.

我们也不知道自然中神灵将要诞生,或者是与某些自然物质及自然现象有关。

耶鲁公开课 - 旧约导论课程节选

And according to Klawans and others, ritual impurity arises from physical substances and states which are not in themselves sinful.

据克洛文和其他人所说，仪式的不洁是由自身有罪的,物质和状态引起的。

耶鲁公开课 - 旧约导论课程节选

The experts said some plant chemicals are high in antioxidants -- substances that remove harmful chemicals from the body.

VOA: special.2009.05.19

Two substances, blood and water.

两种物质血液和水。

麻省理工公开课 - 热力学与动力学课程节选

He says the substances are especially dangerous because they travel through the air and stay in the atmosphere, soil and water.

VOA: special.2009.06.23

But this isn't very convincing. Only one set of diseases is said to generate ritual impurity, and many substances these are not sources of ritual impurity to Israel's priests.

但这不是很令人信服，只有某一疾病,时由于不洁的仪式引发的，很多,这些对以色列祭司来说并不是不洁的来源。

耶鲁公开课 - 旧约导论课程节选

The chemicals are joining twelve other substances that are already banned under a treaty known as the Stockholm Convention.

VOA: special.2009.06.23

So Klawans notes in the article you read that the physical substances and states that are labeled impure and are therefore designated as antithetical to the realm of holiness are states that are associated with death on the one hand, and procreation on the other. Why should this be?

克洛文对你们现在读到的文章有过这样的说明,那些被贴上不洁标签,然后被认为和神圣的领域相对立的物质和状态,一方面来说都和死亡有关系，而另一方面和生殖有关，这是怎么回事呢？

耶鲁公开课 - 旧约导论课程节选

Sweet potatoes, carrots and other darkly colored fruits and vegetables contain substances that the body can change into vitamin A.

VOA: special.2009.04.21

Some of the most important helpers in the job of good health are the substances we call vitamins.

VOA: special.2009.04.21

They make proteins including oxygen-carrying blood substances, antibodies to protect against disease, and substances that break down sugar.

VOA: special.2009.12.08

The tests showed that many of the substances contained high levels of antioxidant chemicals known as polyphenols.

VOA: special.2009.05.19

For example, he believes it may be possible to examine substances within a mummy, like embalming liquid.

VOA: special.2010.06.29

Since then, scientists around the world have been working to identify substances gathered from Comet Wild-Two.

VOA: special.2009.09.30

They said spices contain substances that kill or slow the growth of dangerous bacteria in food.

VOA: special.2009.05.19

Mister Cooper says the substances build up in the cells of plants, animals and human beings.

VOA: special.2009.06.23

Iron is a micronutrient. Micronutrients are important substances that are found in small amounts in foods.

VOA: special.2011.01.05

The chip removed ninety-nine percent of the salt and other harmful substances from water samples.

VOA: special.2010.04.05

Sir John Vane found that aspirin blocks the body from making natural substances called prostaglandins.

VOA: special.2009.10.20

To prevent this from happening, levodopa can be combined with other substances, like carbidopa.

VOA: special.2009.04.07

A filter is designed to reject some substances, while permitting others to pass through.

VOA: special.2010.01.05

His team found that locusts and cockroaches carry substances that may help kill microbes.

VOA: special.2010.12.07

Allergies are abnormal reactions of the immune system in response to otherwise harmless substances.

VOA: special.2009.07.28

Scientists strongly believe that finding such substances will be goals of future space flights.

VOA: special.2010.05.25

By the nineteen-twenties, sports organizations were attempting to stop the use of doping substances.

VOA: special.2011.04.12

We learn where scientists found one of the basic substances necessary for life.

VOA: special.2009.09.30

These substances can damage the human nervous system and natural defenses against disease.

VOA: special.2009.06.23

Much of our good health depends on the cooperation between substances.

VOA: special.2009.04.21

And they contain substances that are believed to fight cancer.

VOA: special.2010.03.09