linch·pin /ˈlɪnʧˌpɪn/
制輪楔,車轄,關鍵
Linch·pin n. A pin used to prevent the wheel of a vehicle from sliding off the axletree.
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linchpin
n 1: 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"
[syn: anchor, mainstay, keystone, backbone, lynchpin]
2: pin inserted through an axletree to hold a wheel on [syn: lynchpin]