This is the 7766th most frequent Chinese word.
铺开
To spread out or unfold.
In this sentence, "铺开" means to physically unfold or spread out an item, such as a map or fabric, indicating a concrete action.
他拿出一张地图，慢慢地铺开。
He took out a map and spread it out slowly.
Here, "铺开" is used metaphorically to describe the wide-ranging appearance or covering, creating a vivid imagery of spring.
春天来了，大地铺开了绿毯。
Spring has arrived, and the earth has spread out a green carpet.
In this usage, "铺开" figuratively describes the gradual development or unfolding of discussions or themes.