The discus（ used in track competition）, once（ designed《 with its weight ＜concentrated ＞》in a metal center）, but now（ lined with lead around the perimeter） 我感觉从语义不容易发现没有谓语，因为修饰成分，不管是状语，分词都可以传达意思。所以还得从结构上发现啊，我用括号括起来的都是过去分词做状语修饰那个中心词ｄｉｓｃｃｕｓ．
with st doing/ done ＋ 介词短语（ in a metal center） with st +介词短语 （around the perimeter）
discus是主语，把后面修饰的都去掉，直接过到lined with 就可以看出，lined with与discus之间少谓语，discus只能被lined with
-- by 会员 backlighting (2011/3/14 19:59:09)
The discus used in track competition, once designed with its weight concentrated in a metal center, is now lined with lead around the perimeter
这么改对么。。我只能改成这样。没法追求平行了 题目正确的句子是 Once designed with its weight concentrated in a metal center, the discus used in track competition is now lined with lead around the perimeter.
The discus（ used in track competition）, once（ designed《 with its weight ＜concentrated ＞》in a metal center）, but now（ lined with lead around the perimeter） 我感觉从语义不容易发现没有谓语，因为修饰成分，不管是状语，分词都可以传达意思。所以还得从结构上发现啊，我用括号括起来的都是过去分词做状语修饰那个中心词ｄｉｓｃｃｕｓ．
with st doing/ done ＋ 介词短语（ in a metal center） with st +介词短语 （around the perimeter）
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发表于 2011-3-14 17:41:17
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