Descriptions of fear, anxiety and happiness.
我突然冒出了一阵冷汗。

My feet rooted to the ground. 脚底生根似地站在那儿。

My blood ran cold.
My blood froze in my veins.
A shiver runs down my back. 我感到一阵凉意(袭来)。

I felt a chill down my spine.
My knees were knocking in fright. 我紧张得膝盖打架。

My knees were shaky; I felt they would bend and I would collapse to the floor.
我的膝盖发抖，我感到我随时都可能瘫倒在地上。

In a split second my heart seemed to leap from my body. 我的心都快跳出来了。

My heart skipped a beat. 我的心脏快要停止跳动了。

我脑子里几乎一片空白。

My mind went blank.我心中一片茫然。

My head was all in a whirl.我头脑一片混乱。

My thoughts ran riot.我的思绪纷乱。

I took a long breath and managed a weak/forced smile. 强作微笑。

I trembled with nervousness. 我紧张得发抖。

He was out of sorts all morning, thinking about the speech.
我一个早上都没精打采的，在想着那个讲演。

I grew red at the audience’s stare. 在观众的注视下我涨红了脸。

I tried to look composed, though my heart was throbbing violently.
尽管我的心跳得厉害，还是极力做出镇静的样子。

My heart sank when…. …….时我的心一沉。

狂喜
I felt as if I were at the top of the world. 我觉得自己是世界上最快乐的人。

He burst into a hearty laugh. 他爽朗地笑起来。

A happy smile spread over her gentle face. 幸福的笑容在她温柔的脸上蔓延开来。

She gave him a demure smile.恬静地笑
Everyone barked with laughter. 哄笑起来
She gave me a big smile. 朗朗一笑
I managed a faint/weak smile. 挤出一丝微笑
The girl giggled / tittered. 格格地笑
He burst out into a horse laugh. 高声狂笑。