Dehiscence of the floor of the hypotympanum with protrusion of the jugular bulb into the middle ear cavity is a rare otological finding 摘要颈静脉球经下鼓室底部骨层裂隙膨入中耳腔，是一种罕见的中耳腔血管异常。
3.
Different low temperature treatments on lilium davidii var . unicolor were used to study the growth and changes of carbohydrate metabolism in bulbs 摘要以兰州百合为材料，研究了百合种球经不同贮藏温度处理后，植株生长及鳞茎碳水化合物代谢的变化。
