tā / men / fèng / mìng / qián / wǎng / qián / xiàn / jiē / fáng / jiē / tì / zhù / shǒu / duō / rì / de / bù / duì

他们奉命前往前线接防，接替驻守多日的部队。

They were ordered to go to the front line to relieve the troops that had been stationed there for many days.