The trachea in some patients is difficult or impossible to intubate under any circumstances.有的病人的气管在任何情况下都是很难、或根本不可能插管的.Is It'safer to Intubate Premature Infants in the Delivery Room?在分娩室内对早产婴儿行气管插管是否更加安全?...
As she spoke she felt a bubble of optimism rising inside her.当她讲话时，她感到内心的乐观情绪越来越高涨。a bubble of oxygen氧气泡News of the defeat quickly burst the bubble of our self - confidence .失败的消息使我们的 自信心 迅速破灭了....
Surface bombardments had nowhere been effective.海面舰只炮击也毫无建树.Bombardments of such density will destroy any defensive works built by the enemy.这样大密度的轰炸会摧毁敌人的所有防御工事.The city has been flattened by heavy artillery bombardment...