After it had stopped snowing, we all went sledging.雪停了以后我们全去坐雪橇玩.Our hill is marvellous for sledging and we always have snow in January.在我们的那座小山上滑雪橇最棒了，而且1月我们那里总会下雪。The Olympic winter Games have to include skiing, ice - ...
成纤维细胞是来源于胚胎中胚层的间充质细胞.Fibroblasts are mesenchymal cells, which are derived from the embryonic mesoderm.它与胚胎中胚层的形成以及左右体轴的决定有关.It is involved in mesoderm formation and left - right axis determination....
The ensuing row snarled up the work of the joint peace commission.随后的争吵把联合和平委员会的工作搅得一团糟。"Let go of me," he snarled.他气急败坏地喊道：“放开我。”The dogs snarled at the intruders.那些狗冲着闯入者狂吠不已。...
目的: 探讨单纯鼓室成形术后发生胆脂瘤的原因并提出预防措施.Objective : To investigate the reasons of the second cholesteatoma of postoperative tympanoplasty.目的探讨外耳道胆脂瘤的病因和治疗方法.Objective To study the cause and treatment of external acoustic meatus ch...