keystone
柯林斯词典
1. N-COUNT A keystone of a policy, system, or process is an important part of it, which is the basis for later developments. 基础; 根本
The government's determination to beat inflation has so far been the keystone of its economic policy. 政府对通货膨胀的坚决抑制迄今为止一直是其经济政策的根本。
2. N-COUNT A keystone is a stone at the top of an arch, which keeps the other stones in place by its weight and position. 拱顶石[技术]
返回 keystone
keystone /ˈkiːˌstəʊn/ (keystones)
剑桥词典
keystone noun [C] (STONE)
architecture specializedthe middle stone in the top of an arch that has a special shape and holds all the other stones in position
拱顶石；塞缝石
keystone noun [C] (IMPORTANT PART)
the most important part of a plan , idea , etc. on which everything else depends
（计划、想法等的）基础，主旨，基本原则 返回 keystone