In a previous design, the weight of the discus used in track competition is concentrated in a metal center, but now it is lined with lead around the perimeter, thereby improving stability in flight and resulting in longer throws.
语法 Sentence Correction-111
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正确的用户笔记
coyama 2014-08-09 09:00:47
design 错误修饰 the weight
许大别扭 2014-04-09 11:38:55
it指代weight of the discus错误；划线部分is concentrated应该使用过去时态
LynnWei 2014-10-16 18:46:08
it 是完整指代 代the weight of the discus 不合邏輯
shisu0610041 2016-09-25 12:48:41
it指代错误，句意上应该说的是 discus；但语法上是weight of discus
BobZ 2015-12-19 14:10:07
it指代weight of the discus错误；划线部分is concentrated应该使用过去时态
essieliu 2015-12-05 21:56:18
Two errors in the original sentence: 1. Verb tense: used previously ........ is concentrated 2. Modifier: the weight of the discuss used .......... but now is lined
Charlotte0305 2015-06-26 17:15:58
a,b都有it指代的问题，语法上it应该指代the weight of... 但是逻辑上说不通，逻辑上应该是discus （铁饼）be lined with lead...
两个月无限可能 2014-12-01 07:42:13
it 的指代问题, 遇到代词要多想, 否则会出错.
liqijie3242656 2014-08-09 18:22:32
improving stability,逻辑上主语不应该为the weight
liqijie3242656 2014-08-09 18:09:31
lined with lead,逻辑上主语不应该为the weight
Deprofundis 2014-07-09 19:10:10
it 指代错误，这里应该是discus没镶嵌上铅（lead） a previous design也不好
