2013年大学英语四级100条阅读难句-sentence 8
As we have seen, the focus of medical care in our society has been shifting from curing disease to preventing disease-especially in terms of changing our many unhealthy behaviors, such as poor eating habits, smoking, and failure to exercise.主干：the focus has been shifting
1. 句首As引导非限制性定语从句，As指代主句所说的内容，在从句中作seen的宾语。
2. 主句中破折号后的内容是短语介词in terms of引导的介词短语作状语，表示“从......方面来说”，changing与前面的shifting构成语义再现。
译文：正如我们所看到的一样，我们社会医疗的重心正在从治疗疾病转到预防疾病上来---特别是要改变我们许多不健康的行为，比如说不良的饮食习惯、抽烟、忽视锻炼。
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