A stone slab in the ceiling of the Great Hall slid open, revealing a square opening.

大殿天花板上的一块石板滑开，露出一个方形的开口。

By the time it had been flipped 120 times or so, the appearance of the sunlight through the square opening became regular.

当它被翻转 120 次左右时，阳光透过方形开口的外观变得规则。