zài / nà / ge / gǔ / dài / gù / shì / lǐ / xī / tǎn / shì / biǎo / shì / shēn / zhòng / qiàn / yì / de / lǐ / jié

在那个古代故事里，膝袒是表示深重歉意的礼节。

In that ancient story, kneeling bare-chested was a ritual expressing deep remorse.