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Unit 118：Mix'em up
第118單元：混合做多種運動
People enjoy exercising more when they engage in more than one activity,says Dr.Brownell.
布洛耐爾博上說:“人們做的運動不只一項時會比較喜歡運動。”
A variety of exercises gives your body a better all-around workout and stretches your easily bored mind.
各式各樣的運動使你更能全身活動，也可以讓你不那么容易感到無聊。
Sometimes a simple stretch is all you need.At other times,you want to go for the burn in an aerobics dance class.
有時候你需要的只是伸伸懶腰，有時候你會想到有氧舞蹈教室去燃燒脂肪。
Another day you may decide to lift weights or go for a long bike ride.
改天說不定你會決定去舉重或騎腳踏車呢。
