Once they were known as shell-shock; then as battle fatigue; then as combat stress reaction.

起初称作炮弹休克，紧接着是战斗疲劳症，而后又变为战斗应激反应。

Cold water immersion also affects the part of the nervous system that controls the fight-or-flight stress reaction.

冷水浸泡也会影响神经系统中控制“战或逃”应激反应的部分。

I can also stress the reaction by changing its temperature.

我还可以通过改变温度来强调反应。

And stress reactions can reduce the disease-fighting effectiveness of the body's immune system, thereby increasing susceptibility to illnesses, ranging from colds to cancer.

而且压力会降低免疫系统有效抵抗疾病的能力，因此增加疾病癌变的几率。