Your neck and back tense up, you slouch.

因此你的脖子和后背开始紧张，显得无精打采。

She could feel herself tense up as he touched her arm.

他碰她胳膊时，她感觉自己紧张得不得了。

Do you feel tense up when you spend time with certain people?

你跟某些人在一起时会不会觉得紧张呢？

Now what happens when we get that feeling? We tense up.

现在，当我们有那样的感觉时会发生什么？我们会紧张。

Just like your muscles need to relax after they tense up, you need to relax after short bursts of focused work.

正如你的肌肉在紧张之后需要放松，在短时间紧张工作之后，你也需要放松。

The morning I described above still makes me tense up some 7 years later.

文章开头我描述的那个早上，在7年之后想起来仍然令我神经紧张。