- n. 制轮楔；轮辖；关键
a central cohesive source of support and stability;
"faith is his anchor"
"the keystone of campaign reform was the ban on soft money"
"he is the linchpin of this firm"
pin inserted through an axletree to hold a wheel on
- Controlling wages is the linchpin of the Government's policies.
- He is the linchpin of this firm.