大量的抛射物撞击更大的天体，形成各种各样的陨石坑，包括“多环盆地”——在行星和卫星上观察到的最大的地质特征。
Massive projectiles striking much larger bodies create various kinds of craters, including "multi-ring basins"—the largest geologic features observed on planets and moons.
巨大的抛射物撞击更大的天体，创造了各种各样的陨石坑，包括多环盆地——这是在行星和卫星上观察到的最大的地质特征。
Massive projectiles striking much larger bodies create various kinds of craters, including multi-ring basins—the largest geologic features observed on planets and moons.
绿色则表明了大分子多环芳香烃的存在。
The green indicates the presence of complex molecules called polycyclic aromatic hydrocarbons.
芘是多环芳烃的一个代表性化合物。
综述了多环芳烃降解菌的应用研究情况；
The application researches on PAHs-degrading microorganisms are summarized.
在城市地区机动车辆是多环芳烃的主要来源。
多环芳烃同样对胎儿的DNA产生直接影响。
多环芳烃在水平方向上的迁移存在色谱效应。
There was a chromatographic effects in the horizontal migration of the PAHs.
总共有140名儿童被分为多环芳烃的高接触者。
A total of 140 children were classified as having high PAH exposure.
在肉类产品中也会经常发现多环胺和其它一些致癌物。
These heterocyclic amines and some other carcinogens too are very often found in meat products.
没有证据证明 多环芳烃对她女儿的智力产生了影响。
There is no evidence that the PAHs affected her daughter’s IQ.
多环芳烃来自于汽车尾气以及住宅供暖和发电的排放。
PAHs are in car or bus exhaust and emissions from residential heating and power generation.
佩雷拉说好消息是纽约市的多环芳烃含量正在减少。
The good news, Perera said, is that levels of PAHs are declining in New York City.
这是第二次，但间接的方式多环芳烃可以导致癌症。
This is a second, but indirect, way in which PAHs can cause cancer.
钢铁企业内的炼焦厂是该区域多环芳烃主要污染源之一。
Coking plant inside the steel mill was one of the most important sources in the area.
她不知道在怀孕期他是处在多环芳烃含量高还是低的环境中的。
She does not know whether her exposure to PAHs during the pregnancy was classified as high or low.
委员会通过了关于在食品最后制备过程中减少多环芳烃摄入的第一份准则。
The Commission adopted the first guidelines for reducing polycyclic aromatic hydrocarbons (PAH) intake through final food preparation.
在克拉科夫，女人们所处的环境多环芳烃含量比纽约的高8倍。
In Krakow, the women on average were exposed to eight times higher concentrations of PAHs than the women in New York City.
香烟中的污染物质PAHs(多环芳香烃)会在几分钟内对基因造成损害。
Pollutants in cigarettes called PAHs (polycyclic aromatic hydrocarbons) can cause genetic damage in minutes.
本文研究了用聚合物与煤焦油沥青反应减少其中的致癌多环芳烃。
The article aims to reduce carcinogenic PAHs of coal tar pitch.
该机构正在要求FDA就多环芳烃对怀孕妇女和儿童无害的最低安全含量做出规定。
The group is requesting that the FDA enact a rule that sets a limit on the amount of polycyclic aromatic hydrocarbons deemed safe for pregnant women and young children.
赫克特特别注意追踪特定的一种多环芳烃——菲，因为菲存在于香烟烟雾中。
One specific type that Hecht was particularly interested in tracking was phenanthrene, which is in cigarette smoke.
斯蒂门记录有另一种对有毒的多氯联苯和多环芳烃有抵抗作用海岸物种，那是一种鳉鱼。
Stegeman has been chronicling resistance to toxic PCBs and polycyclic aromatic hydrocarbons in another coastal species, a killifish.
多环芳烃是由煤炭、柴油、石油和汽油的燃烧释放出来的，或者如烟草这样的有机物。
PAHs are chemicals released into the air from the burning of coal, diesel, oil and gas, or other organic substances such as tobacco.
制备食品时的烟熏和直接干燥工序在燃烧过程中形成的部分多环芳烃可能是人类致癌物。
Parts of PAH are possible human carcinogens formed during the combustion of fuel both in the smoking and in the direct drying processes involved in the preparation of food.
由于燃料燃烧所造成的空气污染中的多环芳烃(PAHs)也使得报告的作者们倍感担忧。
The authors are also concerned at PAHs, airborne pollutants produced by burning fuels.
由于燃料燃烧所造成的空气污染中的多环芳烃(PAHs)也使得报告的作者们倍感担忧。
The authors are also concerned at PAHs, airborne pollutants produced by burning fuels.
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