Due to the omnipresence of dioxins, all people have background exposure and a certain level of dioxins in the body, leading to the so-called body burden.
由于二恶英普遍存在，因而所有人都有接触的环境且身体里都有一定程度的二恶英，也就产生了所谓的机体负担。
By scientific measures, the average American gets 620 millirems of radiation each year, half from background exposure, and that number needs to reach 100,000 to be worrisome.
科学测量结果显示，普通美国人每年受到的辐射为620毫仑目，其中一半属于天然本底辐射，而低于100,000毫仑目的辐射完全不需要担心。
Motion during the long exposure produced streaks in the starry background and the city lights on the darkened planet below.
在长时间曝光中的运动在星光熠熠的背景和下方变暗了的城市灯光上产生了条纹。
Communicate any symptoms to a designated local physician and provide background information on exposure history.
向指定的当地医生报告任何此类症状，并提供关于接触史的背景信息。
The lighting, exposure, background, outfit and makeup are all the same. The only things that changed were the models pose, her hair and the camera angle/composition.
布光、曝光、背景、化妆都是一样的，唯一变化的只是姿势和相机的角度/构图。
Under those conditions photographers shoot with a fast exposure time and small aperture. That makes it impossible to capture faint objects in a dark background, such as stars.
在这种情况下拍摄者会使用很短的快门时间并调小光圈，这样就不可能拍摄到黑色背景上那些很暗的物体，如星星。
The more scenery you wish to include in your background, the tougher it will be to get an even exposure because of all the ambient light you're letting into your camera at wider focal lengths.
你希望容纳到背景里的景色越多，得到平均曝光就越困难，因为焦距越短，进入机身的环境光就越多。
You will be exposing both the lightning and the foreground and background when you are taking these pictures. The ambient light will determine your exposure time.
在曝光时你要照顾到闪电和前后景，周边的光线会限制你的曝光时间。
Background - This study sought to determine whether associations exist between perioperative glucose exposure, prolonged hospitalization, and morbid events after complex congenital heart surgery.
背景——这项研究的目的是确定术前血糖暴露因素与住院时间的延长及复杂先心病术后疾病事件是否存在关联。
Other literacy experts say the real value of reading to children is helping to develop background knowledge in all kinds of topics as well as exposure to sophisticated language.
其他识字专家说，给孩子朗读不仅能够让他们接受复杂语言的熏陶，其真正的价值在于帮助他们掌握各种话题的背景知识。
Steering exposure time of a camera through control electron shutter with laser echo pulse is an effective method for inhibiting background noise.
用激光回波脉冲控制电子快门来操纵摄像机的曝光时间，是抑制背景噪声的一种有效方法。
BACKGROUND: the permeability of blood retinal barrier in rats can be increased due to the exposure under infrasound.
背景：次声暴露导致大鼠血-视网膜屏障通透性增加。
These results have provided useful bases for recommending reference dose of related natural radiation exposure, parameters of Chinese reference Man and background value of radiation monitoring.
这些结果为推荐我国天然辐射剂量参考值、我国参考人相应参数和辐射监测背景值提供了有用依据。
Technically, a practical and stable system for the estimation of the background AD exposure parameter prediction is brought up.
从技术角度提出实现背景广告曝光参数虚拟预测的一个切实可行的体系结构。
The estimation of background AD exposure parameter is important for pre-event negotiation and bidding and post-event sponsoring assessing.
背景广告曝光参数的测算对于赛事的赞助评估、赛事谈判和赛事申办决策具有重要的意义。
This impressively deep exposure of the region also reveals faint and even more distant background galaxies.
在这个天区的精彩长时曝光影像里，还可以看见更遥远的昏暗背景星系。
His enormously over-sized hands and head however suggest his feelings of awkward vulnerability and emotional exposure, but the diaristic inscriptions along the background of the canvas.
过大的手部及头部则暗示他因为显露自己的情感，而感到惶恐不安，但这并非背景上日记体题字所带出的意思。
And each makes publicly available on the IFAC website agenda items and background materials for its meetings, as well as exposure drafts of proposed standards.
而且，在IFAC的网上能够公开地找到每次会议的议程和背景材料，并能找到准则征求意见稿。
Objective To estimate the excess relative risk for solid cancer associated with chronically exposure to high-background natural radiation in Yangjiang area of China.
目的估算阳江高本底辐射慢性照射可能导致的实体癌超额相对危险。
This sharp exposure, a well-timed telescopic image, recorded the space station during the transit against the background of the Moon's smooth Mare Serenitatis (Sea of Serenity).
这张由望远镜拍摄的、时机把握得恰到好处的瞬间曝光照片，捕捉到国际空间站从月面平滑的静海前掠过的一刹那。
Following the background and his girlfriend came to light yesterday (11) day, another netizen exposure 10 years ago, Liu Qian Chang Hui-mei MV exercise video.
继身世和女友曝光后，昨(11)日，又有网友曝光了10年前刘谦参演张惠妹MV的视频。
Following the background and his girlfriend came to light yesterday (11) day, another netizen exposure 10 years ago, Liu Qian Chang Hui-mei MV exercise video.
继身世和女友曝光后，昨(11)日，又有网友曝光了10年前刘谦参演张惠妹MV的视频。
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