foundation stone; cornerstone

• 奠基石

foundation stone; cornerstone的用法和样例：

例句

1. This foundation stone has a history of scores of years.
   这块奠基石已经有几十年历史了。
2. The archaeologists unearthed a cornerstone bearing a Greek inscription.
   考古学家们控掘出一块刻有希腊语铭文的奠基石。