I chalked my sleeplessness up to nerves.

我把失眠归于神经张。

Some are nervous in the dark.

有的人在黑暗处就神经张。

Why is it doctor that I am always so nervy, tense and ready to jump on anybody.

大夫，为什么我总神经质、张、爱发脾气。

We were tense with expectancy.

我们因期待而神经张起来。

Conclusion: The changes of circadian variation of blood pressure are associated with the role of sympathetic nerve and intracardial renin angiotensin system.

结论压昼夜变化受交神经与管张系统等双重作用有关。