Diaryl nitroxides are even more stable than the dialkyl nitroxides.二芳基氮氧化物自由基比二烷基氮氧化物自由基还要稳定.AIM To offer reference for further research of 2, 4 - diaryl - 1 , 3 - dithiolane compounds.目的为进一步设计和研究2, 4- 二芳基 -1, 3-二硫戊环类化合物...
This gaseous impurity is able to bring about metal corrosion and contaminating.这些气相杂质的存在会造成金属材料腐蚀,并污染环境.Untrammelled industrialisation, particularly in poor countries, is contaminating rivers and aquifers.不节制的工业化, 尤其是在穷国...
The airport ground crew tried to dissuade the pilot from taking off.机场地勤人员试图阻止这位飞行员驾机起飞。Ground crew: In that case, would you prefer a non - stop flight?地勤人员: 那么, 你会比较喜欢不停站的航班 吗 ?Ground crew: Please have your boarding pas...
The complex is one of the largest and busiest interchanges in the state of Illinois.它是伊利诺斯州最大和最繁忙的立体枢纽之一.Ernest Felty, head of Hardin County schools in southern Illinois , has 10 home - schooled pupils.欧内斯特?费尔提是伊利诺斯州南部哈丁...
他从广播里听到的都是千篇一律的流行歌曲。The radio had fed him a diet of pop songs.他在学校开通广播，以提高孩子们的警觉性。He introduced radio to the school to increase the children's awareness.广播上说首都的其他地区也遭到了炮火袭击。The radio said other parts of the capital ...