考古学家发现这些古墙是由威尔士运来的青石建造的。

Archaeologists found that these ancient walls were built with ___bluestones transported from Wales.

这座古老的庭院铺着青石板，在阳光下泛着淡淡的蓝灰色。

The courtyard was paved with weathered ___bluestones that gleamed softly in the sunlight.

她戒指上的蓝宝石在阳光下闪闪发光。

The ___bluestones on her ring sparkled in the sunlight.