医学英语长句(二)翻译作业: 1. It is only through an understanding of the impact of the multiple etiologic factors in disease on the host that the mechanisms whereby they disturb normal physiology can be elucidated, only then can one grasp a truly basic understanding of disease processes and lay a groundwork for satisfactory symptomatic or curative procedures. 2. The onset of chronic leukemia is frequently so insidious that it is accidentally discovered when a blood count is obtained for other reasons or when the patient reports to his physician that he has noted a few enlarged lymph nodes or felt, while bathing, a firm left upper quadrant abdominal mass. 3. Many sudden cardiac arrest patients can survive if witnesses act immediately while ventricular fibrillation is still present, but successful resuscitation is unlikely once the rhythm deteriorates to asystole. 4. One should not wait for incontrovertible evidence to make the tentative diagnosis of active rheumatic fever in patients who are thought to be usually susceptible;for example,in those with a known rheumatic valvular lesion, or with a history of previous episode of typical rheumatic fever of with a history of rheumatic heart disease in a parent or sibling, particularly if their illness follows a streptococcal pharyngitis. 5. The current organ policy is shaped largely by two important laws: the first is the Uniform Anatomical Gift Act of 1968, adopted in all fifty states, which granted individuals the right to decide before death whether they wished to donate their organs; the second is the Organ Transplantation Act of 1984 , which aimed to encourage organ donation by establishing an organized organ matching and procurement network , while outlawing the buying and selling of human organs or the direct compensation of organ donors and their families.