物理有一个好处就是，桌面实验能做到直观却不危险地反映结果。
Physics has the advantage that the desktop experiments can do are relatively straight forward than not dangerous.
物理学家认为是因为大脑对危险作出回应比执行一个有意的动机更快。
The physicist suggested that the brain responded to danger faster than it carried out a deliberate intention.
由于复杂的物理和生物原因，腰部多余的脂肪会导致更多的危险。
For complex physiological and biological reasons, this extra fat around the middle causes much greater harm.
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