成串
chéng​chuàn

strung together

成串 chéng​chuàn
strung together verb
to be lined up or connected in a sequence, such as a chain of islands or a string of pearls
clustering
to form a group or bunch, such as a cluster of grapes
successive
to occur one after another in a continuous stream, such as a series of sighs or tears

Sources
Definitions
CC-CEDICT