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Objective: Introduce the recovery type from the clinical application and the method that the body blood return to lose.
目的：介绍回收式自体血回输的临床应用及方法。
Sitting, as opposed to lying down, further decreases blood return from the lower extremities because of the increased work that must be done against gravity.
坐着比躺着更能降低下肢血液循环，因为坐着要增加做功来克服引力。
First Blood is a somber reflection of the hardships that faced Vietnam War veterans upon their return to their native country, in which the protagonist blows up a helicopter with a freaking rock.
《第一滴血》是越战退伍军人回国后所面临的艰辛的严肃写照。在片中主演用块该死的石头炸毁了一架直升机。
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