那时候，牙科学刚起步，拔牙都不打麻药。In those days, dentistry was basic. Extractions were carried out without anaesthetic.他用过麻药,现在仍眩晕无力.He's still groggy from the anaesthetic.局麻药溶液中加入肾上腺素,使血管收缩.The addition of epinephrine to local an...
And how do doctors prevent the spread of typhus?那么医生是如何防止斑疹伤寒的扩散与传播的 呢 ?A typhus epidemic struck in the winter of 1919–20.1919至1920年的冬天斑疹伤寒症流行....illnesses such as smallpox, typhus and the plague.像天花、伤寒和鼠疫这样的疾病Objective ...
The instrument will behave completely different when played'staccato'than when played'legato '.以断奏和连奏方式演奏键盘可以得到完全不同的效果.They were expected to behave themselves.他们应该守规矩。Under certain conditions, electro...
His design was a descendant of a 1956 device...他的设计是从一个 1956 年的装置衍生而来的。a lineal descendant of the company's founder公司创始人的直系后裔He is a lineal descendant of the company's founder.他是公司创始人的直系后裔。Quechua, the lineal d...
Name six perennials and six annuals suitable for indoor flower arrangement.列出多年生及一年生花朵各六种,它们必须是适合插花的.Herbage can be divided into three categories : annuals , biennials, and perennials.草本植物可分成一年生 、 二年生和多年生.Perennials like...