1. Human landscapes of lawn, fields, or flowerbeds provide settings with bare soil and a lack of competitors that are perfect habitats for colonization by opportunists. 【结构分析】句子主干为：Human landscapes of lawn, fields, or flowerbeds provide settings；“with bare soil and a lack of competitors”相当于介词with引导的短语充当“settings”的后置定语；“that are perfect habitats for colonization by opportunists”为that引导的从句充当“settings”的后置定语。 2. Articles about the special report by the New York Times, the Washington Post and many other news outlets emphasized its forecast that obesity may shave up to five years off average life spans in coming decades. 【结构分析】句子主干为：Articles emphasized its forecast；“that obesity may shave up to five years off average life spans in coming decades”为that引导的从句充当“its forecast”的同位语来对其进行补充说明；“about the special report”为介词短语充当“Articles”的后置定语；“by the New York Times, the Washington Post and many other news outlets”充当“Articles”的后置定语。
