In heavy concentrations, ozone is irritating to the eyes, nose and throat.

浓度极高时，臭氧对眼睛、鼻子和喉咙是有刺激的。

They can thrive in soil with high concentrations of metals that are toxic to most other plants.

它们能在含有对大多数其他植物有毒的高浓度金属的土壤中茁壮成长。

A number of neurotransmitters exert their effects by first increasing cyclic AMP concentrations in target neurons.

许多神经递质首先通过增加靶神经元中的循环 AMP 浓度来发挥其作用。

Seawater samples from the area where the seals died did contain unusually high concentrations of the toxic bacterium.

来自海豹死亡海域的海水样本确实含有异常高浓度的有毒细菌。

Tomorrow, we will dump a slightly larger amount, with the cumulative concentrations now trapping more and more heat from the sun.

明天，我们会释放出更大的量，累积的浓度现在会吸收越来越多的来自太阳的热量。

We can replace our concentrations here with, and so if you write equal to zero here, then we can write it as equilibrium right here.

我们可以代替这里的浓度，如果你这里写等于零，那么我们可以在这把它写作平衡状态。

Data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.

从后来的任务中得到的数据显示，在两极地下不到一米的地方有浓度相当高的氢，由此推断是水。

Plankton generally thrive in areas of the ocean with sufficient concentrations of certain nitrogen compounds near the surface, where plankton live.

浮游生物通常在海洋表面附近某些含氮化合物浓度足够高的区域大量繁殖，而海洋表面正是浮游生物生存的地方。

The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment.

分子生物学的新技术使最近的工作成为可能，这种新技术能在环境中检测到低浓度的病毒 DNA。

But Snyder et al point out that the caffeine concentrations needed to inhibit the production of phosphodiesterase in the brain are much higher than those that produce stimulation.

但 Snyder 等人指出，抑制脑内磷酸二酯酶产生所需的咖啡因浓度要比产生刺激的咖啡因浓度高得多。

However, an experimental release of iron compounds into one such area failed to produce a thriving plankton population, even though local iron concentrations increased immediately.

然而，尽管当地铁浓度立即提高，在一个这样的区域实验释放铁化合物却没有产生大量的浮游生物。

Even caffeine, which is generally known only for its stimulatory effects, displays this property, depressing mouse locomotion at very low concentrations and stimulating it at higher ones.

就连人们通常觉得有刺激作用的咖啡因，也表现出了这种特性，它在浓度极低的情况下会抑制老鼠的运动，而在浓度较高的情况下则会刺激老鼠。

Very low concentrations of vanadium, which is scarce in meats and somewhat lower in nuts than in other plant resources, are good evidence of meat consumption and thus a better-balanced diet.

极低浓度的钒在肉类中很少见，在坚果中的含量也比在其他植物资源中较少，这很好地证明了吃肉的好处，从而使得饮食也更加均衡。

Saline soils, which have high concentrations of sodium chloride and other salts, limit plant growth, and research continues to focus on developing salt-tolerant varieties of agricultural crops.

盐碱地含有高浓度的氯化钠和其他盐类，限制了植物的生长，研究继续集中于开发耐盐的农作物品种。

By studying these components, scientists have obtained a detailed archive of many aspects of climate, including air temperatures, snowfall, and concentrations of greenhouses gases in the atmosphere.

通过研究这些成分，科学家们获得了气候的许多方面的详细档案，包括空气温度、降雪和大气中温室气体的浓度。

The complications frequently accompanying diabetes, such as impairment of vision and of kidney function, are now thought to result from the lack of continuous control of blood glucose concentrations.

现在认为糖尿病经常伴有的并发症，如视力和肾功能损害，是由于缺乏对血糖浓度的持续控制所致。

Many are found in tropical and subtropical areas of the world, where the accumulation of high concentrations of metals may afford some protection against plant-eating insects and microbial pathogens.

许多超富集植物被发现于热带地区和亚热带地区，在那里，高浓度金属元素的积累可以为植物提供保护来对抗以植物为食的昆虫和细菌病原体。

The area has one of the world's greatest concentrations of wildlife.

该地区有世界上野生生物最集中的区域之一。

Ir is found in high concentrations in some meteorites, in which the solar system's original chemical composition is preserved.

人们发现，在一些保存着太阳系原始化学成分的陨石中，铱元素的含量很高。

Concentrations of positively charged particles develop at the top and bottom of the cloud, but the middle region becomes negatively charged.

带正电荷的粒子集中在云团的顶部和底部，但中间区域形成的是带负电荷的粒子。

These areas have particularly low concentrations of iron, and oceanographers hypothesize that this shortage of iron prevents plankton from thriving.

这些地区的铁含量特别低，海洋学家推测，铁的缺乏阻碍了浮游生物的繁殖。

A method of HPLC has been established for quantitative determination of concentrations of acetolysis.

建立了高效液相色谱法测定溶出度的方法。

We change concentrations here.

在这里我们改变浓度。

What are the equilibrium concentrations?

那么平衡时的浓度是什么？

In high concentrations, QACs kill bacteria.

在较高浓度下，季铵盐化合物能杀灭细菌。

Clinical interpretation of IMA concentrations.

IMA浓度的临床意义。

To the ratio of the equilibrium concentrations.

和平衡浓度的比相关。

The aim is to achieve the lowest concentrations possible.

目的是实现尽可能低的浓度。

Scientists use the observations to map sea ice concentrations.

科学家利用观测结果绘制出海冰密集图。

There are different groups and concentrations of power in Iran.

在伊朗，有不同的组织和权力结构。