Tā / zài / huì / shàng / chéng / nuò / yào / gǎi / jìn / fú / wù / dàn / dà / jiā / dān / xīn / zhè / zhǐ / shì / tú / tuō / kōng / yán

他在会上承诺要改进服务，但大家担心这只是徒托空言。

He promised at the meeting to improve the service, but everyone feared it was just empty talk.