Many PAHs are carcinogenic or are suspected to be carcinogenic.其主要来源于煤的不完全燃烧,也有相当部分来源于汽车尾气的排放.The both carcinogenic factors were investigated on its dose - response ralationships.研究上述两种致癌因子的剂量 - 效应相关模式.Some industrial ch...
The relationship caused her a great deal of heartache.这段恋情使她非常伤心。I forgot the heartache which makes up the rest of the price.我不应该忘记,补偿价钱的不足部分用的是心痛.Every time she came home late, she caused him heartache.每次她晚归, 他都很伤心....
德加的作品曾经让她大开眼界。Degas's work had been a revelation to her.应当尽量避免使用掺和料, 特别是避免使用须在施工现场掺加的掺合剂.Admixtures should be avoided, particularly those that are added on site.在钢索连接处以上多加的塔的高度纯粹是装饰性的.The additional tower height abo...
As Jefferson said, cities are pestilential to the morals , the health, and the liberties of man.如杰斐逊所言, 城市“毒害了人类的精神 、 体和自由”.It's starting to infringe on our personal liberties.它开始侵犯我们的人身自由。The hard - won liberties s...
The desire to be a mother may creep up on you unexpectedly.你会不知不觉地产生想当母亲的渴望。I would creep in and with stealthy footsteps explore the second-floor.我会偷偷溜进去，轻手轻脚地查看一下二楼。Back I go to the hotel and creep up to my room.我回到旅馆，蹑...
Alcoholism often leads to the alienation of family and friends.酗酒常常导致家庭和朋友间的疏远.Excessive drinking induces alcoholism.饮酒过度会引起酒精中毒.The doctor wrote a treatise on alcoholism.那位医生写了一篇关于酗酒问题的论文....
许多画都是基于简单的几何图案。Many pictures have been based on simple geometric designs.蜘蛛网的几何形状the geometry of a spider's web建筑物的几面墙上有复杂的几何图案.The building has intricate geometrical designs on several of the walls....