tā / biǎo / miàn / shàng / zhuāng / de / hěn / píng / jìng / ， / shí / jì / shàng / zǎo / jiù / zài / qiè / xǐ / le / 。

他表面上装得很平静，实际上早就在窃喜了。

He pretended to be calm, but in fact he had been secretly delighted for a while.