SCIENCE STUDY
Cause of great feeling
作者:DALE FOX, 21ST CENTURY TEENS STAFF
为什么跑步会让你感觉舒畅? 词数 357 建议阅读时间 5分钟 测试见 IV版
Running is often tiring and a lot of hard work, but nothing beats the feeling you get after finishing a long workout around the track (跑道).
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