nerve-wracking
紧张的
The interview was an nerve-wracking experience.
面试是令人紧张的经历。

pound
扑通跳动；连续重击
My heart is pounding.
我的心很紧张。
His heart was pounding with excitement.
他的心紧张的扑通扑通跳。

shake in one's boots
某人吓得发抖
I'm shaking in my boots.
我吓得发抖。
Here we go.
开始行动；现在试试
I'm not quite good at singing and dancing, but anyway, here we go.
我不是很擅长唱歌和跳舞，不管怎样，试试吧。

freak out
吓坏
I'm totally freaking out.
我完全被吓坏了。
A: This is nerve-wracking.
这让我好紧张。
B: Relax. There's nothing to worry about. Thousands of airplanes fly millions of flights every year.
放心松，没有什么好担心的。每年有数千架飞机在上百万条航线航行。
A: I've never flown before and my heart is pounding.
但我从来没有坐过飞机，我的心一直怦怦跳。
B: Everything will be fine. If you want to, you can hold my hand while we take off.
不会有事的。如果你想要的话，飞机起飞时你可以抓住我的手。
A: Thanks. How many flights have you been on?
谢谢你，你坐过几次飞机了？
B: None. This is my first.
没做过，这是我第一次做。
A: You're so brave and I am shaking in my boots.
你好勇敢，而我吓得直发抖。
B: Not me. I think it's exciting. I can't wait until we're flying like a bird, high in the sky. Here we go, we're finally taking off.
我才不会，我觉得这很刺激，我等不及可以像鸟一样在高空翱翔。出发啦，我们终于可以起飞了。
A: Wow, this is fun, it's so fast. Awesome, we are flying.
哇，好有趣，飞的好快，我们飞起来了！
B: Hold my hand. I'm totally freaking out. This is terrifying.
抓住我的手，我完全被吓坏了，这好恐怖呀。