1 N-COUNT [oft with poss] (常指建筑物奠基典礼时放置的)基石,奠基石 A foundation stone is a large block of stone built into a large public building near the bottom. It is often involved in a ceremony for the opening of the building, and has writing on it recording this. (常指建筑物奠基典礼时放置的)基石,奠基石 [mainly British]
in AM, use 美国英语用 cornerstone
2 N-COUNT (存在或成功的)根基,根本 The foundation stone of something is the basic, important thing which its existence or success depends on. (存在或成功的)根基,根本
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