tā / bèi / chāi / pài / dào / wài / dì / gōng / zuò / yì / nián / yīn / cǐ / zàn / shí / bù / néng / huí / jiā

他被差派到外地工作一年，因此暂时不能回家。

He was dispatched to another region for a year, so he cannot return home for now.