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This is SCIENCE IN THE NEWS in VOA Special English. I’m Shirley Griffith.

And I’m Bob Doughty. Today, we will talk about（梅花奥不太到位） diet and weight loss. Exercise（r没有卷舌） is important if you want to get in good shape. But experts say exercise alone is not enough if your goal（似乎off了。嘴巴一定要圆。l似乎还是发的off） is to lose weight.

It is that time of year again! Warm weather has returned to Earth’s northern hemisphere. Summer is a time when people of all ages feel like getting（可浊化） their swimwear and going to the nearest（r和e可以组成一个音节） swimming pool or seashore. But first, there is that troublesome little thing called winter weight gain. Many of us gain weight because of inactivity during the winter.