美 [wʌn baɪ wʌn] 英 [wʌn baɪ wʌn]

one by one

Adverb

in single file;

"the prisoners came out one by one"

one piece at a time;

"she sold the plates by the piece"

apart from others;

"taken inpidually, the rooms were, in fact, square"
"the fine points are treated singly"

one by one近义词

inpidually one at a time singly separately one after another by the piece severally