Correct

轮番

/ lúnfān /
Strokes

Definition

in turn/one after another

Example

As an Adverb

alternately; by turns; in turn; in rotation

1
Shuāngfāng
双方
jūnbèi
军备
jìngsài
竞赛
lúnfān
轮番
shēng
升级

spiralling escalation of the arms race between the two sides

2
Lúnfān
轮番
gōng
攻击

attack by turns; make rounds of attacks

3
Lúnfān
轮番
hōngzhà
轰炸

bomb in waves