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 in China, while the agriculturally advanced countries exceed 60 percent.
【正确答案】At present, the contribution made by science and technology to agriculture accounts for about 35 percent of the agricultural production increase in China, while it exceeds 60 percent in the agriculturally advanced countries.
【答案解析】 原译文没有弄清分句的主语，原文“世界上农业发达国家在60%以上”的主语应该是上文提到过的“农业科技的贡献”而非“世界上的发达国家”，原文是为了避免重复而将主语省略了。英译时为避免重复，应该用代词it代替。