Correct

一环扣一环

/ yī huán kòu yī huán /
Strokes

Example

Definition

one ring linked with another—closely linked; connect with one another closely

1
Xué
学习
yào
huán
kòu
huán
  
,
lái
  

You should study methodically, going step by step.

2
shì
故事
qíngjié
情节
huán
kòu
huán
  

The plot of the story is compact.

3
huán
kòu
huán
一环
kāizhǎn
开展
gōngzuò
工作

work systematically