人们暴露在农药下的安全浓度因人而异，但是由此产生的严重后果除了脑损伤和生育缺陷外，据信还会引发癌症。
Safe levels of human exposure vary widely, but on top of things like brain damage and birth defects, some have also been linked to cancer.
20世纪90年代，空气污染时最严重时（如图所示），臭氧这种最常见的污染物的平均浓度大约是安全浓度的一半。
The average concentration of ozone, one of the most common pollutants, is about half its level in the early 1990s, when the air was at its dirtiest (see chart).
20世纪90年代，空气污染时最严重时(如图所示)，臭氧这种最常见的污染物的平均浓度大约是安全浓度的一半。
The average concentration of ozone, one of the most common pollutants, is about half its level in the early 1990s, when the air was at its dirtiest (see chart).in.
专家说，对珊瑚礁来说，全球大气二氧化碳浓度已经超过了安全浓度，即使最有雄心的未来十年碳减排计划挽救不了它们。
Experts say the world has already passed the safe level of carbon dioxide in the atmosphere for coral reefs, and even the most ambitious carbon cuts planned for coming decades will fail to save them.
目的观察二氧化氯气体多次经呼吸道接触对实验动物的蓄积毒性作用及其靶器官，确定人体可直接暴露于二氧化氯气体的安全浓度。
Objective to study the cumulative toxicity and target organs of repetitive inhalation exposure to chlorine dioxide, and determine the safe concentration of chlorine dioxide for human.
目的：研究酸枣仁汤对小鼠自发活动的影响，确定酸枣仁汤的安全有效浓度。
Objective:To study influence of suanzaoren decoction on mice's locomotor activity and determine the safe effective concentration of suanzaoren decoction.
周二的一次采样发现碘-131的浓度高达法律规定安全线的750万倍。
One sample found levels of iodine-131 to be as high as 7.5 million times the legal limit at one point on Tuesday.
目的：通过对90例氨茶碱血药浓度监测结果的分析，提出个体化给药建议，使氨茶碱在临床上使用更安全有效。
Objective: To put forward individual dose proposal by the analysis on blood drug concentration of Aminophylline of 90 cases for its safe and efficient clinical usage.
结论在一定时间间隔和安全用量范围内，使用低浓度地卡因反复表面麻醉是安全有效的，是慢性鼻窦炎、鼻息肉鼻内窥镜手术的较佳选择。
Conclusions the repeated surface anaesthesia with low-concentration Dicaine is safe and effective, and it is a better choice in endoscopic surgery for chronic nasosinusitis and nasal polyp.
以一种酒精浓度高的、减少了二氧化碳的烈性黑啤为基础，科学家已经创造出了一种太空安全啤酒，称为“东方号”。
Selecting a strong, reduced-carbon dioxide stout, the researchers have created a space-safe beer called "Vostok" (in honor of the first manned, Russian spacecraft flown by Yuri Gagarin in 1961).
在煤矿安全问题中，瓦斯气体浓度是煤矿安全监测的重要指标之一。
In coal mine safety problem, gas strength is one of an important safety inspection factors.
目的探讨重庆地区驾驶员血液中乙醇浓度(BAC)和驾驶能力的关系，为交通安全立法提供科学依据。
Objective to explore the relation between blood alcohol concentration (BAC) and driving ability in Chongqing in order to provide scientific evidences for traffic safety legislation.
它含有高浓度的杂质和不安全的各级微量元素。
It contained high levels of impurities and unsafe levels of trace elements.
在规定的灭火浓度下对人体完全无害，可以在有人停留的场所安全地使用；
It does no harm to human body under the prescribed concentration that is applicable in places where people would access or stay.
但由于该区煤层瓦斯含量高、浓度大，成为煤矿安全生产的主要影响因素。
But since the high coal bed gas content and concentration largely affected coalmine safety in production.
一次风煤粉浓度的可靠测量是电站锅炉燃烧优化和安全经济运行的前提条件。
The creditable measurement of pulverized coal concentration in primary air is the basis of combustion optimization and safe operation of utility boilers.
对于电站煤粉锅炉，合理配置燃烧器喷口的煤粉浓度是锅炉安全、经济运行的重要条件和保证。
To dispose rationally the pulverized coal concentration in the outlet of all pulverized coal-fired boilers is the essentials and guarantee for the safe and economic operation.
同时便于实现自动化控制，节约劳动力，安全性高，灰尘排放浓度低，占地面积小。
On the other hand, automation can be easily achieved, thus manpower can be saved, safety secured, low dust emission concentration and small foot print.
采用光学测量方法，不仅能精确测量甲烷气体浓度，而且安全可靠。
The optical measurement method can not only be used to accurately measure the concentration of methane gas, but also be safe and reliable.
所以在该安全应用中，通常不考虑气体浓度。
Safety applications, therefore, are not generally concerned with measuring the volume concentration of gas.
试验浓度范围内对黄瓜苗安全。
It was also safe to cucumber seedling in the range of trial concentration.
结论：在丙戊酸治疗药物监测中，要关注影响丙戊酸血药浓度的因素，确保患者用药安全有效。
CONCLUSION: in therapeutic drug monitoring of valproate, it should be concerned about the impact factors of valproate concentration to ensure the safety and efficacy in patients.
这个浓度是安全的最鱼，并在此浓度，原生动物不能住这个水平的含盐量。
This concentration is safe for most fish, and at this concentration, protozoa cannot live with this level of salinity.
煤矿井下瓦斯和煤尘的浓度控制是通过煤矿井下通风量的优化分配实现的，是实现煤矿安全生产的关键环节。
The density control of gas and coal dust is done through optimal allotment of the ventilation quantity in the coal mine well.
瓦斯隧道装药爆破前必须进行安全检查，确保瓦斯浓度小于1%。
Before charging and blasting in gas tunnel, safety inspection must be done to ensure the gas density less than 1%.
目的：证实十二烷基硫酸钠（SDS）抗HSV-2的效应，初步确定其有效浓度与安全性。
Objective: To confirm the suppressing effect of sodium dodecyl sulfate (SDS) on HSV-2 including effective concentration and safety.
目的：证实十二烷基硫酸钠（SDS）抗HSV-2的效应，初步确定其有效浓度与安全性。
Objective: To confirm the suppressing effect of sodium dodecyl sulfate (SDS) on HSV-2 including effective concentration and safety.
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