They compared the fat intake of groups of vegetarians and meat eaters, and matched their diets up with levels of harmful blood fats.
他们比较了素食者组和肉食者组的脂肪摄入量,并把他们的膳食和血脂危险水平对应起来。
《柯林斯英汉双解大词典》
2
It should be noted that the two groups of children had been carefully matched by the investigators so that they were comparable in age, ethnicity, race, and social class.