这些门还要染色涂清漆。The doors are then stained and varnished.这种料子容易染色 吗 ?Does this material stain easily?此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.At this point esch chromosome consist of a pair of chromatids and the two associated chromos...
He was replaced by Lt Frank Fraser.他被弗兰克·弗雷泽中尉顶替。George Fraser was clearly a good soldier, calm and resilient...乔治·弗雷泽显然是个好士兵，沉着冷静且适应力强。Lord Fraser's speech offers much food for thought...弗雷泽勋爵的讲演发人深省。Fraser did not...
1875年,来自东部的拓荒者在这个地区定居下来.Pioneers from the East settled in this region in 1875.约翰. 肯尼迪为新拓荒者精神的典型人物.John F . Kennedy typified the new frontier spirit.《拓荒者》引出了库珀笔下最有名的两个人物.The Pioneers introduced Coopers two best - known cr...
In those days, dentistry was basic. Extractions were carried out without anaesthetic.那时候，牙科学刚起步，拔牙都不打麻药。His work was important in helping establish dentistry as a separate profession.他在推动牙医学发展成一门独立学科的过程中发挥了重要作用.Health Sc...