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. 基礎; 根本
The government's determination to beat inflation has so far been the keystone of its economic policy. 政府對通貨膨脹的堅決抑制迄今爲止一直是其經濟政策的根本。
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. 拱頂石[技術]
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
拱頂石；塞縫石
keystone noun [C] (IMPORTANT PART)
the most important part of a plan , idea , etc. on which everything else depends
（計劃、想法等的）基礎，主旨，基本原則 返回 keystone