然而由于手臂的位置低于心脏，所以抖动悬垂的手臂只能让新鲜的血液流进前臂，但是不能促进“陈血”流出前臂。
While the dangling-arm shakeout allows good blood flow into the forearm, it doesn't help the flow of "old blood" out of the forearm, due to the arm's position below your heart.
周围末梢动脉血管疾病——手臂和腿供血血管的疾病。
Peripheral arterial disease - disease of blood vessels supplying the arms and legs.
透过挡风玻璃，他看到一个人向他走来，手臂上都是血。
Peering through the windshield, he saw a figure approach him, arm covered with blood.
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