静脉瓣膜
Galveston plans───加尔维斯顿计划
valve trains───汽门机构
Galveston plan───加尔维斯顿计划
basilic veins───[解剖]贵要静脉
blue veins───青筋；静脉血管
broken veins───静脉破裂
holes in one───一杆进洞
leading reins───主导缰绳
sales increase───销售额增长
deep venous valves was the main cause resulting in the recurrence of varicose veins after varicotomy in lower extremities.───下肢静脉曲张术后复发的原因较为复杂，其主要原因是深静脉瓣膜功能不全。
Valves in the veins prevent blood from flowing backward toward the head, but if the valves don't close sufficiently, blood could seep back upward.───静脉中的瓣膜阻止血液倒流到脑部，但是如果瓣膜不足，血液会就会再次流到大脑。
In nature, veins acting as valves are controlling the blood circulation; heart valves control the flow of blood in the Chambers of the heart and maintain the correct pumping action.───在自然界中，静脉作为排气阀控制血液循环，心脏瓣膜控制血液的流量在心室的，保持正确的抽水行动。