作为乐趣和令人兴奋，因为可以野餐，许多儿童，尤其是青少年，往往与他们联系无聊。

As fun and exciting, as picnics can be, many children, especially teenagers, tend to associate them with boredom.

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美国研究人员称，极度肥胖的儿童和青少年患过敏症，尤其是食物过敏症的风险正在增高。

Obese children and teens are at increased risk for allergies, especially food allergies, say U. s. researchers.

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美国研究人员称，极度肥胖的儿童和青少年患过敏症，尤其是食物过敏症的风险正在增高。

Obese children and teens are at increased risk for allergies, especially food allergies, say U. s. researchers.

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