lynchpin

同义
backbone anchor keystone linchpin lynchpin mainstay
词性
n
解释
a central cohesive source of support and stability
示例
faith is his anchor|the keystone of campaign reform was the ban on soft money|he is the linchpin of this firm

同义
linchpin lynchpin
词性
n
解释
pin inserted through an axletree to hold a wheel on
示例
None