verb · to be lined up or connected in a sequence, such as a chain of islands or a string of pearls

海面上散布着成串的小岛。

to form a group or bunch, such as a cluster of grapes

葡萄架上挂满了成串的紫葡萄。

to occur one after another in a continuous stream, such as a series of sighs or tears

她伤心地哭着，泪水成串地往下掉。