一道IS真题求解,Geneticengineeringofplants,whichhasbothopponentsandproponents,mayhelpimprovedroughttoleranceinvegetables,[adevelopmentthatcouldincreasecropyields.]括号里为划线部分我想知道划线部分是所谓的

Question

一道IS真题求解,
Genetic engineering of plants,which has both opponents and proponents,may help improve drought tolerance in vegetables,[a development that could increase crop yields.] 括号里为划线部分
我想知道划线部分是所谓的同位语吗?如果是的话,它修饰的是前面哪一部分?我现在对同位语还有什么定语从句概念十分模糊,

Answer 1

修饰的是may到vegetables这句话.a development that could increase crop yields是同位语里面套有定语
同位语和定语的区别：同位语是阐述名词或句子的内容,而定语从句是对名词或句子的限定、解释、说明.
下面看一个例子,可以更好的理解同从和定从:
同从：he told us his plan that he will first go to shanghai then he will visit qingdao.
定从：he told us his plan （that/which) he made with his girlfriend last night.