我心里七上八下的。

I had a few butterflies in my stomach.

把孩子托付给他们，她心里七上八下的。

She felt uneasy about leaving the children with them.

上一年级的第一天，我站在门口，心里七上八下。

On the first day of my first grade, I stood by the door with butterflies in my stomach.

达西先生的心里被两种情感弄得七上八下：一方面爱慕她那步行之后的鲜艳的脸色，另方面又怀疑她是否值得为了这么点儿事情独个儿打那么远赶来。

The former was divided between admiration of the brilliancy which exercise had given to her complexion, and doubt as to the occasion's justifying her coming so far alone.

婚礼期间，这两位新人心里一定会十五只吊桶打水——七上八下（注1），因为这次航程将有15次过山车式的俯冲，持续时间30秒。这种飞行方式，用航空专业术语说，叫做抛物线弧形俯冲。

The newlyweds are sure to have butterflies in their stomachs because the trip includes 15 rollercoaster-type dives, known as parabolic arcs, which last up to 30 seconds.