284. The Centers for Disease Control, for example, found that less than one-fourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet.

英语四级译文:
比如说，疾病控制中心发现，只有不到四分之一的想要减肥的超重成年人说他们把运动与节食结合了起来。

四级词汇讲解:
本句的主干是The Centers for Disease Control found that for example为插入语;that引导的是found的宾语从句，其中who were trying to shed pounds是overweight adults的定语从句;they were combining exercise with their diet为said的宾语从句。

shed pounds的意思是“减轻体重”，相当于shed stones。如:
I'd like to shed a few pounds.我想减掉几磅体重。

combine...with…的意思是“将……与……结合起来，混合”。如:
Remember to combine the eggs with a littxe flour.记得把鸡蛋和少量面粉混合在一起。

英语四级考点归纳:
动词combine可用于以下搭配中:

※ combine to do sth.意为“结合起来做某事”。如:
These factors have combined to harm our friendship.这些因素凑在一起，伤害了我们的友谊。

※ combine sth. with意为“在做某事的同时做……”。如:
You can't combine studying with playing.你不能在学习的同时还想玩。

※ combine sth.意为“混合某物”。如:
Combine all the ingredients in a bowl.把所有配料放到碗里搅拌。