环环相扣的英文：
link by link

link是什么意思：
n. 环；节；联系，纽带
v. 连接；联系；挽住

open link cable
开口链环锚链

The strength of the chain is in the weakest link.
链子的承受力在于最薄弱的一环。

They forged the links with the Labor Party.
他们与工党建立了联系。

The thermostat is connected by a link to the carburetor
恒温控制器是由一根连杆与汽化器相连的。

Diet and health are strongly linked.
饮食与健康是紧密联系在一起的。