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.
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。
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.
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.
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.
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.
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.
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.
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.
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.
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.
采用静态实验方法研究了多环芳烃荧蒽对两种海洋硅藻的毒性作用。
The toxic effects of fluoranthene on two marine diatoms were investigated using the static method.
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.
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.
利用PUF大气被动采样技术，对深圳市室内大气多环芳烃进行了为期6~8周的连续观测。
In this study, PAHs in indoor air of Shenzhen was monitored by PUF passive sampler for a period of 6~8 weeks.
结果显示，混合塑料燃烧时，多环芳烃排放总量要比单组分燃烧多环芳烃量加权平均后的水平低；
Test results show that the total PAH emitted by burning a multicomponent plastic mixture is lower than the weighted mean, obtained for the individual components.
还有一个要担忧的问题：肉类的油脂滴落在热烫的煤炭、石头或者炉子上会产生另一种致癌物质——多环芳烃。
There's also concern that fat dripping from meat onto hot coals, stones or burners creates additional carcinogens called polycyclic aromatic hydrocarbons.
2003年“雪龙号”北极科学考察期间，对沿途海洋大气进行采样，分析其中气相多环芳烃的空间分布。
In the 2003 Chinese Arctic Research Expedition (CHINARE 2003) aboard the Xuelong, ocean air samples were collected to analyze gaseous polycyclic aromatic hydrocarbons (PAHs).
研究对象的香烟中添加了一种多环芳烃化合物，该物质进入人体后被转化为另一种破坏dna的致癌化学物质。
A PAH was added to the subject's cigarettes, which was then modified by the body and turned into another chemical which damages DNA and has been linked with cancer.
结果显示，气相中主要是2—4环的多环芳烃，其中菲为主要的化合物，平均占到总多环芳烃的55.1%。
Only 2—4 ring PAHs were detected in gas phase, and phenanthrene was the most abundant with an average of 55.1% in total PAHs.
这些结果具有重要意义，因为多环芳烃二醇环氧化物极易与DNA反应，进而导致变异，因此被视为香烟烟雾中所含多种多环芳烃中最重要的致癌物质。
These results are significant because PAH diol epoxides react readily with DNA, induce mutations, and are considered to be ultimate carcinogens of multiple PAH in cigarette smoke.
所以他才用了这么多玄而又玄的术语，还有这么多一环套一环的从句。
That was why he deployed so much arcane terminology, so many loop-de-looping clauses.
所以他才用了这么多玄而又玄的术语，还有这么多一环套一环的从句。
That was why he deployed so much arcane terminology, so many loop-de-looping clauses.
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