The natural background values of Hg in soils of Dalian was also obtained.
给出了大连市土壤中汞的自然背景含量。
But natural background radiation is more than 100,000 times the highest levels detected.
但其检测量大大高于自然本底辐射量一万倍。
But natural background radiation is more than 100, 000 times the highest levels detected.
但其检测量大大高于自然本底辐射量一万倍。
The typical continental monsoon climate was the natural background for which the droughts occurred.
典型的大陆性季风气候是旱灾发生的自然背景。
These can be compared with the average doses people normally receive from natural background over 20 years.
这些剂量可用以比较20年中人们通常接受的自然环境放射的平均剂量。
Radiation doses to humans may be characterized as low-level if they are comparable to natural background levels.
对人类的放射剂量如果与自然环境辐射水平相比属低水平。
It is believed that such a level is of no significance to human health having regard to natural background levels.
令人信服的是，考虑到自然本底值，这样小的放射水平对人体健康是无关紧要的。
The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background.
调查结果表明，上海市各类水体中天然放射性核素浓度属正常本底水平。
The results show that the radioactivity level of varied water bodies of the region was within normal natural background.
调查结果表明，宁夏回族自治区水体中天然放射性核素浓度属正常本底水平。
The experiments show that this method is effective in recognizing manmade targets and camouflaged targets from natural background.
实验结果表明，该方法不仅可以很好地识别自然背景中的人造目标，而且对热红外伪装目标的识别也很有效。
Tracking laser signal is very difficult under natural background condition due to the interference of environment and background noises.
在自然背景条件下，由于环境噪声和背景噪声的干扰，使激光信号的跟踪变得困难。
This article gives an account of the relationships between the natural background values of elements in soil and environmental conditions.
本文详细叙述了土壤中元素自然背景值与环境的密切关系。
A high sensitive neutron monitor is described in this paper. It has an approximate counting rate of 20 CPM for natural background neutrons.
本文介绍了一种高灵敏度中子监测器，它对天然中子本底的计数率约每分钟20次计数。
The technique for recognizing the artificial target recognition in natural background is important to military science technology and civil auto-control.
自然背景下人工目标的识别技术，在军事科学领域和民用自动控制领域具有非常重要的意义。
For most people more than half of their natural background radiation dose comes from radon, a radioactive gas that can accumulate in homes, schools and workplaces.
对大多数人来说，他们自然环境辐射剂量的一半以上来自氡—一种可聚集在家庭、学校和工作场所的放射性气体。
A neutral colour palette of white and reconstituted stone creates a natural background for the mall, showcasing its tenants and their merchandise to maximum effect.
白色和再造石中性色调为商场打造自然背景，使租户商品展示达到最佳效果。
The effect of natural background and noise in infrared image, fuzzy edge of infrared object, make it difficult to segment and label artificial object in natural background.
自然背景复杂的纹理特征和红外图像中的噪声影响，以及红外目标模糊的边缘，给红外目标的边界检测和分割带来一定的困难。
A fast detection algorithm for artificial IR targets is presented which is based on the difference of fractal dimensions between simple natural background and man-made targets.
利用自然背景与人造目标在分形维数上的差异，提出了一种针对自然背景下的快速红外目标检测技术。
Structure grammar based on local area of collection of line segmentation and geometric element and number of classes of geometric element could extract manmade object from natural background.
基于直线段集合图像给定区域内直线线段的结构文法及其所含几何基元数目和几何基元种类将人造目标从自然背景中提取出来。
I like his dream to build a unique poetical village of a true feelings, to melt into a natural background becoming an invisible part of Nature, "always sitting happily on the soaring clouds".
我喜欢他的梦想：建立一个充满真情的独特的诗歌的村庄，成为大自然无形的一部分，并融入自然背景之中，“总是很幸福地坐在飞翔的云上”。
As lead and arsenic pollution element are skew distribution, statistics of a natural background value and a content of lead and arsenic are worked out using median method of skew distribution.
由手铅、砷污染元素呈偏态分布，故采用偏态分布中的中位数法作了铅、砷自然背景值及含量的统计。
The main source comes from the background load, namely natural background load and upstream contribution load from the upper reaches of the Yangtze River, the Jialing River and the Wujiang River.
污染负荷主要来自长江、嘉陵江、乌江上游的贡献和天然背景负荷。
This paper analyzes some problems existing in Shanxi's environmental emergency monitoring of the natural background, present environmental pollution, technical equipment, and personnel quality, etc.
剖析了山西省环境应急监测在自然背景、环境污染现状、技术装备、人员素质等方面存在的问题，提出了强化环境应急监测的对策建议。
Of course, like every other environmental issue today, this is playing out against the background of global warming and human interference with natural ecosystems.
当然，就像今天的其他环境问题一样，这是在全球变暖和人类干涉自然生态系统的背景下发生的。
Of course, like every other environmental issue today, this is playing out against the background of global warming and human interference with natural ecosystems.
当然，就像今天的其他环境问题一样，这是在全球变暖和人类干涉自然生态系统的背景下发生的。
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