③
关键;枢纽;要点(事情赖之而转的轴心)
相关 名词理据由「门赖铰链而转」喻「事物赖之而转的关键」——c.1600 起指 that on which events turn(the hinge of the matter「事情的要害」)。
例句
Timing is the hinge of the whole plan.时机是整个计划的关键;由门赖铰链而转喻事赖之而转(相关·比喻)——关键、枢纽。
溯源路径本义 → 义项3