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linchpin

英['lintʃpin]美['lintʃpin]

n. 制轮楔,车辖,关键

同：	[n.] anchor, backbone, keystone, lynchpin

The linchpin of geologic disposal has traditionally been“ defense in depth”— that is, the reliance on favorable geology plus engineered barriers, such as multilayered glass and metal packaging, to isolate wastes.
传统上，废弃物的地质处置关键应该是「面防御」换句话说，是奠基在有利的地质条件外加工程的屏障上（如多层玻璃和金属覆盖）以隔绝废弃物。收藏
A cotter pin;a linchpin.
扁销;制轮楔收藏

名词解释：

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
[同] keystone, anchor, backbone, linchpin, lynchpin, mainstay
pin inserted through an axletree to hold a wheel on
[同] linchpin, lynchpin

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