Once designed with its weight concentrated in a metal center, the discus used in track competition is now lined with lead around the perimeter, thereby improving stability in flight and resulting in longer throws.
语法 Sentence Correction-113
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许大别扭 2014-04-09 11:39:21
Designed引导的过去分词结构作定语修饰句子主语 the discus，逻辑正确
zheng911 2015-01-07 23:40:44
(C) Correct；Designed引导的过去分词结构作定语修饰句子主语 the discus，逻辑正确。 design的固定搭配: design something to do something be designed for somebody/something be designed as something be designed with sth according to 后面要跟法规的具体内容，而如果单说是根据什么什么法规，就要用in accordance with。 总结： 看 according to 一般要连更为具体的内容，通常放在句首，或者句中作插入语，根据目前的Gmat题，不需要逻辑一致。
tricolorviola 2015-07-17 16:45:01
is lined with lead around the perimeter指 铁饼周围被灌满了铅
marcusly17 2014-10-18 13:17:42
design的固定搭配::design something to do something be designed for somebody/something be designed as something be designed with sth
