But the cephalic veins are sometimes difficult to isolate.
但部分患者分离头静脉存在困难。
2
Within hours the plankton run out, the feast winds down, and the mantas plow the bay's sandy bottom with their cephalic fins to throw hidden prey back into the water column.
在几个小时内浮游生物的盛宴即将结束，而蝠鲼犁其头鳍于海湾的沙底中，等待下一批猎物的到来。
3
Caudally the junction of the upper lateral cartilages with the cephalic edge of the lateral crus defines the scroll area.