It's such a beautiful city, it's a shame we didn't have more time to look around.

look 是动词，意思是"看"，指用眼睛观察的动作。 around 是副词，意思是"周围、四处"，表示在某个范围内移动或观察。 look around 这个短语的意思是"四处看看"，指在某个地方随意地参观或游览。