tā / zài / zhǎng / bèi / miàn / qián / jī / jù / ér / zuò / xiǎn / de / shí / fēn / ào / màn

他在长辈面前箕踞而坐，显得十分傲慢。

He sat with his legs spread out in front of his elders, appearing very arrogant.