“大吃一惊”，汉语成语，形容对发生的事感到十分意外。可以翻译为“be startled at；be astounded at；be greatly surprised；get a shock”。

例句：

查尔斯看到他时大吃一惊。

Charles got a shock when he saw him.

队伍蓦然地进了村子， 使居民们大吃一惊。

The sudden arrival of the troops in the village came as a great surprise to the inhabitants.