原文：目前，农业科技在中国农业增产中的贡献率约为35%，世界上农业发达国家在60%以上。译文：At present, the c

原文：目前，农业科技在中国农业增产中的贡献率约为35%，世界上农业发达国家在60%以上。译文：At present, the contribution made by science and technology to agriculture accounts for about 35 percent of the agricultural production increase, while the agriculturally advanced countries exceed 60 percent.
【正确答案】：改译：At present, the contribution made by science and technology to agriculture accounts for about 35 percent of the agricultural production increase, while it exceeds 60 percent in the agriculturally advanced countries.
【题目解析】：根据原文可知前后两句的主语都是农业科技，所以后半句的主语可以用it指代。