We need to know the weight and the girth .

我们需要知道（箱子的）重量和周长。

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Knowing your Body Mass Index (BMI) is the second number you should know. You need two Numbers to calculate your BMI, your height and weight.

你需要了解的第二个数字是身体质量指数(BMI)，你要用身高和体重来计算你的BM I值。

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We all know that in order to lose weight we need to eat less and exercise more - but research suggests there are a few other tricks when it comes to shedding the pounds.

众所周知，为了减掉多余的体重，我们需要吃得更少，锻炼更多。然而，研究表明有一些其他的诀窍让你甩掉赘肉。

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"Dr. Fox would always be encouraging, saying we are going to get the weight back off, you know what you need to do and you've done it before, " Ms. White says.

WSJ: Motivational Interviewing: Tool for Smoking Cessation, Weight Loss and Chronic Disease Management