练习说明：

周一到周五是16个单词 + 一段翻译（单词做到认识就好，快速记忆多次重复。翻译关注紫色部分的表达，可以进行互译检测：看到中文回忆英文，看到英文回忆中文）

周六真题及其详解，再次巩固词汇体会完形题目

周日文章结构图，可以对照之前的翻译练习再次巩固

前期大家可以多关注单词。

每日词汇

每日翻译

Of even greater concern is the fact that obesity turns out to be very difficult to define. It is often defined in terms of body mass index, or BMI. BMI equals body mass divided by the square of height. An adult with a BMI of 18 to 25 is often considered to be normal weight. Between 25 and 30 is overweight. And over 30 is considered obese. Obesity, in turn, can be divided into moderately obese, severely obese, and very severely obese.

turn out to be：结果是，被证明是

in terms of：在…方面