来自nerve,神经，神经质。引申词义紧张的。

1. I get very nervous because I'm using a lot of expensive equipment.

因为正在使用很多昂贵的设备，所以我非常紧张。

2. He developed a nervous twitch and began to blink constantly.

他身体出现了神经性抽搐，开始不停地眨眼睛。

3. She felt nervous, increasingly lacking in confidence about herself.

她感到紧张，对自己越来越没有信心。

4. This works through the mediation of the central nervous system.

这是通过中枢神经系统的调节作用实现的。

5. She's nervous about something, in case you didn't notice.

她正为了什么事神经紧张，你连这个都没看出来？