黄道的倾角是季节的基本成因.The obliquity of the ecliptic is the fundamental cause of the seasons.黄道面与赤道面的夹角是黄道的倾角.The obliquity of ecliptic is the fundamental cause of the seasons....
The cephalic veins are sometimes difficult to isolate.部分患者分离头静脉存在困难。One of the best areas for the cannula is the cephalic vein in the shoulder area.肩部的头静脉是放置静脉导管最好的部位之一.Results The incidence of cephalic presentation dyst...