Boron - substituted polyaromatic mesophase prepared by co - pyrolysis of a tar pitch with pyridine - borane complex under autogeneous pressure.以煤焦油沥青和吡啶硼烷为原料采用加压热缩聚工艺制备硼取代聚芳烃中间相沥青.A new syntan product prepared with tar p...
See if you can nail the chairman down to an exact date.看你能不能迫使主席把准确日期定下来。The main events were as follows: first,the president’s speech,secondly,the secretary’s report and thirdly,the chairman’s summing-up.主要活动如下:第一项,总裁讲话...
Pauline was already resigned to losing her home.保利娜已经无奈地接受了失去家园的事实。Chief Supt Pauline Clark波林∙克拉克总警司Derek criticised every aspect of Pauline's behaviour, something he had never done when they were courting.德里克对保利娜的行...
He's a very small man with a lined, craggy face.他是个脸部轮廓分明、皱纹明显的矮个子男人。The short, craggy Property Protection chief settled down in a facing chair.这位身材短小, 面孔粗犷的财产保卫部部长在对面一张椅子上坐了下来.He had a craggy face.他面容粗犷....
His doughty campaigns for the underprivileged have earned him national respect.他为弱势群体奔走呼号，赢得了全国的尊敬。The campaigns are part of American-style innovations being pioneered by the new universities.这些运动是几所新建大学倡导的美式创新的一部分。This ...