不好说，因人而异。因身体结构，肌肉类型及 Mechannical ratio不同而不同

来源: coach1960 于 2015-09-20 17:18:42 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.