我的心还在跳动，我的精神还在战斗，但我的身体知道是时候说再见了。
My heart can still beat, my spirit can also fight, but my body knows it's time to say goodbye.
美国士兵经常负载过重的战斗载荷，这就增加了对身体的压力，使得士兵们精疲力竭。
Dismounted soldiers often carry heavy combat loads that increase stress on the body, leading to injuries and exhaustion.
当你遭受压力时，你的身体进入了“战斗或逃跑”模式，这种状态需要大量的能量。
When you are experiencing stress, your body is programmed to go into fight-or-flight mode, a state that requires a lot of energy.
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