用户中心
华慧考博-考博英语两个复杂句子的结构分析(二十九)
1. Given the large number of tree genes and the little that is known about them, tree engineers are starting with a search for genetic “markers”.
【结构分析】句子主干为：“tree engineers are starting with a search for genetic “markers””；“Given the large number of tree genes and the little that is known about them”为given引导的介词短语作状语，其中“that is known about them”为that引导的从句充当“the little”的后置定语。
2. To this end, Dr. Amerson and his colleagues are taking part in the Pine Gene Discovery Project, an initiative to identify and sequence the 50,000-odd genes in the pine tree’s genome.
【结构分析】句子主干为：“Dr. Amerson and his colleagues are taking part in the Pine Gene Discovery Project”；“To this end”为目的状语；“an initiative”为“the Pine Gene Discovery Project”的同位语来对其进行补充说明；“to identify and sequence the 50,000-odd genes in the pine tree’s genome”为不定式充当“an initiative”的后置定语。
