惊喜瞬间填满心英语怎么说

In English, you could say that "a moment of surprise fills the heart." This is a common way to describe the feeling of being suddenly surprised or delighted.
The phrase comes from the way that emotions can feel like they fill up a person's heart, almost as if the heart were a container. When someone is surprised or delighted, they may feel their heart becoming full of these positive emotions.
Here are a few examples of how this phrase could be used in a sentence:
When I saw my friend after not seeing her for years, I felt a moment of surprise fill my heart.
The young couple was overjoyed when they found out they were expecting a baby, and a moment of surprise filled their hearts.
When I won the lottery, I couldn't believe it and felt a moment of surprise fill my heart.