foundation-stone

n large block of stone laid at a special ceremony to mark the founding of a public building 奠基石（在奠基典礼上放置的大石块, 标志公共建筑物开工）.

forwardness, forwent, fossil, fossil fuel, fossil man, fossilization, fossilisation, fossilize, fossilize, fossilise, foster, foster-, fought, foul, foul play, foul-mouthed, foul-up, foully, foulness, found, foundation, foundation course, foundations, founder, founder-member, founding father, foundling, foundry, fount, fountain, fountain-head, fountain-pen, four, four-, four-in-hand, four-letter word, four-ply, four-poster, four-square, four-wheel drive, fourfold, foursome,