Tā / suī / rán / biǎo / miàn / shàng / hěn / píng / jìng / xīn / lǐ / què / yīn / zhè / cì / lí / bié / ér / àn / rán / shén / shāng

他虽然表面上很平静，心里却因这次离别而黯然神伤。

Although he appeared calm, he was dispirited inside because of the separation.