蝴蝶胃中乱飞？

I couldn't keep a straight face. 我无法保持冷静。

He won the competition hands down. 他轻易地赢得了竞争。

She has green thumbs. 她精于园艺。

It was a hair-raising experience! 这真是一场可怕的经历啊！

She turned her nose up at the food. 她很不屑于这些事物。

I'm up to my eyeballs in paperwork. 我处理不了这么多的文件。

I just can't get head around the fact that……. = I can't understand it. 我不理解／不相信。

I suppose I can turned a blind eye to……= I can pretend not to notice. 假装不看见。

Your father thought I was pulling his leg.=Your father thought I was joking. 开玩笑。

He would probably think that you were pulling the wool over his eyes.=He thought you were trying to deceive him. 隐瞒／蒙蔽

I actually had butterflies in my stomach. =I was very nervous. 我很紧张。