suī / rán / xīn / lǐ / hěn / nán / guò / tā / hái / shì / qiǎng / yán / huān / xiào / de / jiē / dài / le / kè / rén

虽然心里很难过，她还是强颜欢笑地接待了客人。

Although she was very sad, she forced herself to smile while receiving the guests.